|Date of Birth||May 5th, 2051|
|Relatives|| Gouka Shirogane (father)|
Hinoko Shirogane (mother)
Rin Shirogane (elder sister)
|Occupation||Student, Gaist Crusher|
|Affiliation(s)||Gaist Crusher Garrison|
|Gaist Gear(s):|| Flame Fenrir|
God Hinokagu-tsuchi (God finale)
|Game Debut|| Gaist Crusher|
Gaist Crusher God
|Anime Debut||Episode 01|
|Appears in||Game, Anime, Manga|
|Voice Actor||Daiki Yamashita|
- ""Being largely fed is especially pep!! (ご飯大盛り！元気特盛り！)""
- ——Rekka's catchphrase
Rekka Shirogane is a seventh grader who attends the Tekkou High School . He is a short tempered, fun loving and a boy that dreams to do anything with fiery determination. He sports the colour red that reflects his hair, the element of fire, and his poor grades. His favorite food are the lunch boxes made from his family's own restaurant.
Outgoing and very friendly,Rekka is generally nice person,though his hot-blooded often gets into fight quite often. He genuinely cares for his friends,and was not afraid to step into dangerous situations,just to keep them inspired.
Despite being a balanced fighter,Rekka usually rushes in without thinking,leaving him completely beaten up most of the time. However,he make up for it by refusing to give up no matter what.
- Super Explosive Flaming Blow Bullet (超爆・烈火爆裂弾): Rekka's signature crushing move, when he winds his punch while charging energy, and delivering it in one highly explosive punch.
- Scorching Round Wave (灼熱円斬波): Rekka's crushing move when using large swords during weapon form.
- Summer Death Brand (サーマルデスブランド): Rekka's crushing move when using large scythes during weapon form.
- X-Inferno (X-インフェルノ): Rekka's crushing move when using dual gauntlets during weapon form.
- Blazing Pressure (ブレイシングプレッシャー): Rekka's crushing move when using hammers during weapon form.
- Flame Crisis (フレイムクライシス): Rekka's crushing move when using dual pistols.
- Destruction Volcano (デストラクションボルケーノ): Rekka's crushing move when in gun-elemental weapon form.
- Flame Wolf Blade (炎狼剣): Flame Fenrir's weapon form.
- Tail Blade (ティルブレイド): Rekka does a spinning-roll attack with the blade on its tail. It is done using either Flame Fenrir or Bakuen Fenriorn in Extreme Form mode.