Shiori Izawa

A distinctive-voice specialist

Shiori Izawa is a distinctive-voice specialist — Nanachi, Pochita, Megadrive, Moomin’s Ninni, Sakura in Nagatoro — rather than a solo-artist singer. Her character-song catalog runs to roughly twelve core tracks across twelve-plus works. She’s the deepest of the three GX Autoscorer voices in non-Symphogear material, even though her Symphogear-side catalog is the same zero the trio shares.

Where to start listening: track 3 — 憧れに捧ぐ花 — because Nanachi is her career-defining role and this three-voice version is the closest the Made in Abyss music program gets to a pure Nanachi showcase.

Between zero and seven

Catalog-shape context from the cast’s other essay-only and essay-light cases: Misaki Kuno has zero solo-credited tracks across her career. Ai Kayano has seven. Izawa sits between them. One released solo single (YES!YES!YES!YES! / Diary, 2016, the theme for her shī-channel webshow) that never made it to Spotify; two artist-credited collaborations that did — 夏と猫のソネット (2017, with TECHNOBOYS) and ハッピーエンド (2020, a duet with Ai Kayano). Net Spotify-realized artist-credit: two tracks. Net solo catalog in circulation: zero without counting her own webshow’s self-released theme, one counting it.

So the playlist leads with the two artist-credit tracks that exist and then inhabits a character-song catalog that is unusually wide — roughly thirty tracks across twelve-plus works. What binds them is the distinctive-voice thesis: Izawa is the casting answer when a role needs a squeaky-cute pocket-creature (Pochita, Nanachi’s “naa~” vocalizations, Moomin’s Ninni), a deadpan teenage bully (Sakura in Nagatoro), a retro-tech console-girl (Megadrive in SEGA HARD GIRLS), or a specific pitch that most voices don’t sit at. The playlist’s job is to walk through those textures while keeping each character legible.

Tokyo 7th Sisters, not Wake Up Girls

One factual thread to surface early because it re-routes the unit identity: Izawa is a member of Tokyo 7th Sisters, not Wake Up, Girls! She voices 芹沢モモカ (Serizawa Momoka / “100Ka”) across two T7S subgroups — 777☆SISTERS (the full 21-voice cast ensemble) and WITCH NUMBER 4 (a four-member subunit). T7S has been active since 2015 and produces substantial character-song output; sixteen of Izawa’s Spotify-verified tracks are T7S credits, making it her single most productive unit affiliation by a wide margin.

That lives in the playlist as slot 6 (777☆SISTERS full-ensemble H-A-J-I-M-A-R-I-U-T-A-!!) and slot 10 (WITCH NUMBER 4 subunit Tokimeki♡Soda). The subunit-plus-full-ensemble pairing is how T7S usually gets represented when a single playlist covers both; two slots is the right weight for the density she has inside one franchise.

The cross-cast duet

Slot 5’s ハッピーエンド (2020) is the one track on this playlist that’s also on another essay’s excluded list. It’s a straight duet between Izawa and Ai Kayano, artist-credited, from the Reverse Re:Cord Project 2nd Season compilation. Two seiyuu who are both in our Symphogear cast, both in the A5 character-song-dense shape, sharing a duet credit in a completely non-Symphogear context. For Izawa it’s one of exactly two artist-credit tracks in her entire Spotify-indexed catalog; for Kayano it’s one of several collabs, but across the cast it’s a cross-cast tie worth making visible on both sides. It sits at slot 5 here.

The GX Autoscorer trio — zero franchise songs, but the deepest non-franchise catalog

Izawa voices Micha Jawkān in Symphogear GX — the fire-element Autoscorer, one of three subordinates under Carol Malus Dienheim in the Symphogear cast. Her trio-mates are Leiur (earth, Shizuka Ishigami) and Garie (water, Michiyo Murase); Phara Suyūf, the fourth Autoscorer, is outside the cast.

The trio’s Symphogear character-song output is zero across all three seiyuu. Micha included — no solo, no ensemble, no B-side, no OST bonus track, no retrospective-album slot. The GX character-song sequence covered the wielders, and the Autoscorer cluster, as written-out-in-season antagonists, received nothing.

The editorial contrast the three Autoscorer essays share is with AXZ’s Bavarian Illuminati trio — Kotobuki (Saint-Germain), Shōta Aoi (Cagliostro), R. Hidaka (Prelati). Both are three-member villain units in the Symphogear cast. One got three character-song singles plus a wielder-duet crossover; the other got nothing. The rule the franchise follows: antagonists written out mid-season get zero character songs; antagonists whose arcs convert them to recurring allies (Elfnein, voiced by Kuno, from the same GX alchemist faction) eventually earn an album slot. Micha is on the zero side.

Inside that shared structural zero, Izawa’s case is the deepest non-franchise catalog of the three — Ishigami at ten tracks, Murase at three, Izawa at twelve. It’s the difference between a role that routed nowhere after GX and a working career in distinctive-voice specialty that kept accumulating material independent of Symphogear entirely. The Autoscorer role is absent from her playlist not because it was skipped but because the franchise music program itself didn’t produce any.

The twelve tracks, in detail

1. 夏と猫のソネット (2017)

Credited to TECHNOBOYS PULCRAFT GREEN-FUND feat. 井澤詩織 on the MUSIC FOR ANIMATIONS (Lantis Edition) compilation. TECHNOBOYS is the composer-producer collective behind the Shimoneta and Nazo no Kanojo X scores; this is Izawa’s lead vocal on a TECHNOBOYS original (not an anime tie-up). Mid-tempo summer-ballad arrangement. Slot 1 because this is one of the two tracks in her entire catalog where her name is on the Spotify artist-credit line rather than hidden behind a character-credit — the right opener for a playlist whose thesis has to survive listeners who don’t recognize any of the character names.

2. ウィッチ☆アクティビティ (2014)

The OP of Witch Craft Works, credited to KMM団 — the in-show Witch Club including 倉石たんぽぽ (CV: Izawa) plus four other characters. TECHNOBOYS-produced, which means slots 1 and 2 share a producer credit line. Early-2010s anime-music recognition track; her career-breakout ensemble. Lantis-era anison at the peak of the form.

3. 憧れに捧ぐ花 (Made in Abyss, 2017)

A three-voice character song for Made in Abyss — Riko (Miyu Tomita) plus Reg (Mariya Ise) plus Nanachi (CV: Izawa). Made in Abyss is the late-2010s psychological-adventure anime that turned Izawa’s Nanachi performance into her career-defining role: the “naa~” vocalizations, the emotional vulnerability, the specific register that sits somewhere between child-voice and trauma-survivor. A pure Nanachi solo would have been ヒミツメイト, but that track isn’t on Spotify. The trio arrangement here is the closest available Nanachi showcase and, for most listeners, will be the track that orients the whole playlist.

4. Bestie Storm (2017)

A two-voice duet from Scorching Ping Pong Girls — くるり (CV: Izawa) plus 石榴 (CV: Furuki Nozomi). Bright comedic arrangement. Slot 4 covers the duet-comedy register that the trio and ensemble slots around it don’t reach.

5. ハッピーエンド (2020)

The Izawa × Kayano duet, artist-credited on the Reverse Re:Cord Project 2nd Season compilation. Second of her two Spotify artist-credit tracks. The cross-cast weight is covered above; musically it’s a straightforward duet ballad, and both voices are recognizable as themselves rather than as characters — which is rare for either artist.

6. H-A-J-I-M-A-R-I-U-T-A-!! (Tokyo 7th Sisters, 2014)

A 777☆SISTERS ensemble — the 21-voice full-cast Tokyo 7th Sisters franchise signature. The title translates as “Beginning Song!!” which is appropriate for the franchise’s official introduction track. Izawa as 100Ka is one of the twenty-one credited voices. Slot 6 is the T7S-primary slot.

7. Blue Spirit (2019)

An Azur Lane five-character ensemble credited to the Astrum unit — Illustrious, Baltimore, Dido, Tashkent (CV: Izawa), and Albacore. Mid-tempo ballad arrangement. Adds Azur Lane to the franchise breadth and locates Izawa inside the gacha-game ensemble format that dominates mid-to-late-2010s character songs.

8. MY SADISTIC ADOLESCENCE♡ (2021)

A four-voice Don’t Toy With Me, Miss Nagatoro character song — Nagatoro (Sumire Uesaka), Gamo-chan (Mikako Komatsu), Yotchi (Aina Suzuki), Sakura (CV: Izawa). Bratty-teenager comedy anthem in the Nagatoro bullying-classmate register. Pairs with slot 3 to show Izawa in two of her most-discussed roles (Nanachi, Sakura) in two different modes — the gentle-trauma register and the cheerful- bully register.

9. Shiny Happy Days (2020)

The OP of Nekopara, credited to the six-cat-girl ensemble including Azuki (CV: Izawa). Bright J-pop arrangement — a register fourth in the playlist’s sequence, after artist-credit, TECHNOBOYS-ensemble, trio, duet, unit-ensemble, game-ensemble, and Nagatoro-ensemble. The cute-voice mode Izawa slips into for Azuki is one of her specialty textures, and the Nekopara ensemble is where it’s most clearly isolated.

10. Tokimeki♡Soda (2015)

A WITCH NUMBER 4 subunit track — the four-member subunit-within-T7S (Momoka plus three), distinct from the full-ensemble 777☆SISTERS. Punchy-pop arrangement that’s sonically distinct from T7S’s anthemic full-cast register. Pairs with slot 6 to give Tokyo 7th Sisters real weight on this playlist — full-cast at slot 6, subunit at slot 10 — which is how the unit’s actual listening shape is organized.

11. 進み続ける兎たち (2023)

A Blue Archive four-member “RABBIT 小隊” ensemble — Miyako, Saki, Moe (CV: Izawa), Miyu. Rock-band-derived tempo with game-ensemble production; different from the moody-ambient house style that’s otherwise typical of Blue Archive’s character-song program. The slot covers the 2023-era output and shows that Izawa’s character-song work is still accumulating in gacha-game contexts.

12. おっきいりんごの唄 (2019)

A six-voice Moomin franchise character song — Moomintroll (Haruka Tomatsu), Papa (Yasuhiro Kikuchi), Mama (Kaoru Katakai), Little My (Aki Toyosaki), Snufkin (Takahiro Sakurai), Ninni (CV: Izawa). Ethereal-gentle child-voice showcase for Izawa as Ninni — the lullaby-inside-Moomin-world register that’s unlike anything else on the playlist. Closing on this rather than on an anthem is the editorial move: quiet, ethereal, character-specific. Moomin is also a Finnish franchise with Japanese voice acting, which adds a small cross-national texture the rest of the playlist doesn’t have.

Her Symphogear contribution

Izawa voices Micha Jawkān — the fire-element Autoscorer in GX (2015), one of Carol Malus Dienheim’s three subordinates in the Symphogear cast. Red palette. Written out in-season; no subsequent-season reappearance. No character-song releases across any Symphogear album — the Symphogear-songs sub-playlist for Micha Jawkān is zero tracks, same as Leiur and Garie. The Autoscorer cluster is the absent-music cluster, and for the editorial context on why, see Ishigami’s essay (Leiur), Murase’s (Garie), and Kuno’s (Elfnein, the one alchemist character with one track).

What was considered and left out

Excluded because they’re Symphogear

• Micha Jawkān character songs — none exist. Same empty-set as the rest of the Autoscorer trio.

Considered but Spotify-unavailable

• YES!YES!YES!YES! / Diary (2016) — her one genuine solo single, released on Second Shot label (SSHC-1025) as the theme for her shī-channel webshow. Not on Spotify in any findable form. The natural opener for the playlist; the TECHNOBOYS collab takes the position instead.
• SEGA HARD GIRLS tracks — Megadrive character-song catalog (ちょびっと16bit, Blooming!!, セハガガガンバッちゃう!!). Lantis-era CDs not uploaded to Spotify; would have been a distinctive- voice showcase if available.
• Made in Abyss Nanachi-solo version of 旅の左手、最果ての右手 — only the trio version is on Spotify.
• shio★rika (radio duo with Rika Tachibana) — no commercial releases found.

Considered but editorial cut

• PRIZM♪RIZM (WITCH NUMBER 4 alternate) — one subunit slot suffices.
• カラフル・キャンバス (Nagatoro alternate) — one Nagatoro ensemble suffices.
• Departures -あしたの歌- (777☆SISTERS alternate) — one T7S full-ensemble slot suffices.

Companion playlists proposed

• Shiori Izawa · Character Songs — the remaining thirty-plus catalog beyond what fits in twelve tracks. Tokyo 7th Sisters additional tracks, Nagatoro ensemble variations, Blue Archive alternates, Moomin alternates, plus roles that didn’t fit.
• Shiori Izawa · Tokyo 7th Sisters — optional unit-specific deep dive. Pairs thematically with Takagaki/Kotobuki’s Sphere companion and Nanjō’s fripSide companion when those take shape.

Final listen sequence

 1. 夏と猫のソネット              (2017) · TECHNOBOYS feat. 井澤詩織 (artist-credit)
 2. ウィッチ☆アクティビティ       (2014) · KMM団 (as Tanpopo)
 3. 憧れに捧ぐ花                   (2017) · Made in Abyss trio (as Nanachi)
 4. Bestie Storm                   (2017) · Scorching Ping Pong Girls duet (as Kururi)
 5. ハッピーエンド                 (2020) · w/ 茅野愛衣 (artist-credit duet)
 6. H-A-J-I-M-A-R-I-U-T-A-!!      (2014) · 777☆SISTERS (T7S, as 100Ka)
 7. Blue Spirit                    (2019) · Astrum ensemble (as Tashkent)
 8. MY SADISTIC ADOLESCENCE♡      (2021) · Nagatoro 4-cast (as Sakura)
 9. Shiny Happy Days               (2020) · Nekopara 6-cast (as Azuki)
10. Tokimeki♡Soda                  (2015) · WITCH NUMBER 4 (T7S subunit)
11. 進み続ける兎たち                (2023) · Blue Archive RABBIT 小隊 (as Moe)
12. おっきいりんごの唄              (2019) · Moomin ensemble (as Ninni)