Character profile
Tsukasa Futaba
双葉ツカサPat Sprigs
Biography
Tsukasa Futaba is Subaru's classmate and is usually seen carrying a Wave Scanner containing Gemini. After a traffic accident leaves him helpless, Gemini saves him by offering power, and Tsukasa accepts, becoming possessed. Together they can perform Denpa-Henkan to become Gemini Spark, which manifests as separate black and white bodies with differing motives.
Story spoilers
Gemini Spark later gathers Negative Energy from the FMs to form the Andromeda Key. The black half prematurely summons Andromeda before being sacrificed by the white half, while the white half is ultimately destroyed by Cepheus. Tsukasa survives without memories of the ordeal.
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