[Helios]

Here are some sounds that were left out:
Spectre: “Ready, go! Prepare yourself! Dokidoki! Ghost!”
レディゴー!覚悟!ド・キ・ド・キ!ゴースト!
Redigō! Kakugo! Dokidoki! Gōsuto!

Self Spectre: *Plays Ghost’s phrase and then Spectre’s phrase*

Robin: “Hello! Arrow! See you in the woods!”
ハロー！ アロー！ 森で会おう！
Harō! Arō! Mori de aou!

Beethoven: “Composition! Destiny! Dun dun dun dunnn!”
曲名！ 運命！ ジャジャジャジャーン!
Kyokumei! Unmei! Jajajajān!

Billy the Kid: “Never missing! Bull’s-eye! Zukyūn! Bakyūn!”
百発! 百中！ ズキューン！バキューン！
Hyappatsu! Hyakuchuu! Zukyūn

Benkei: “Big Brother! Muscles! Daunting stance!”
アニキ！ ムキムキ！ 仁王立ち！
Aniki! Mukimuki! Niōdachi!

Tutankhamun: “The pyramids are triangular! Credentials for Royalty!
ピラミッドは三角！ 王家の資格!
Piramiddo wa sankaku! Ōke no shikaku!

Nobunaga: “My Way of Life! Okehazama!”
我の生き様！ 桶狭間！
Ware no ikizama! Okehazama!

Houdini: “Seriously cool! Amazing magician!“
マジいいじゃん！スゲーマジシャン！
Maji ījan! Sugēmajishan!

Shakespeare: “Surely! Romeo and Juliet!”
きっと！ロミオとジュリエット！
Kitto! Romio to Jurietto!

Shinsengumi: “Kondō! Hijikata! Okita! Shoulder hug with you and me! Shinsengumi!”
コンドウ！ヒジカタ！オキタ！君と 肩組み！新選組！
Kondō! Hijikata! Okita! Kimi to kata kumi! Shinsengumi!

Unification: “Nobunaga! Hideyoshi! Ieyasu! When will it be achieved! Unification!” ノブナガ！ヒデヨシ！イエヤス！果たすのはいつ！天下統一！
Nobunaga! Hideyoshi! Ieyasu! Hatasu no wa itsu! Tenka tōitsu!

Kamen Rider: “Partner is a bike! Finisher is a kick!”
相棒はバイク！必殺はキック！
Aibō wa baiku! Hissatsu wa kikku!

Showa Rider: “Gonna protect the peace! We are Showa!”
守るぞ平和！俺ら昭和！
Mamoru zo heiwa! Orera Showa!

Heisei Rider: “A new personality! This is Heisei!”
新たな個性！これが平成！
Aratana kosei! Kore ga Heisei!

Dark Rider: “The power of darkness! Bad guys!”
闇の力！悪い奴ら！
Yami no chikara! Warui yatsura!

The Self Specter one sounds like either a fusion form or maybe Makoto's soul. You can listen to the sounds in the post above.