Kasha Imhof piloted the Sol Conver/Ideo-Buster craft, forming the legs of the Ideon mecha. She fought alongside Cosmo Yuki and Moera Fatima as a core trio, regularly engaging the Buff Clan forces. Her personality demonstrated fierce loyalty to the Solo Ship crew and a strong protective instinct, especially toward children like Lou, Ashura, and Fard. This protectiveness coexisted with a hot-tempered and impulsive streak, sparking occasional conflicts with other crew. Initial hostility focused on Karala Ajiba, whom Kasha blamed for colonist deaths during the Buff Clan's Solo attack, a resentment rooted in Karala's alien origins and perceived responsibility.

Her perspective shifted as the narrative unfolded. Distrust of Karala gradually lessened, culminating in acceptance upon learning of Karala's pregnancy. Kasha expressed genuine happiness for the unborn child, symbolically named "Messiah" by her and Cosmo, revealing a capacity for empathy and reconciliation beyond her earlier animosity.

During the final clash with the Buff Clan flagship Ganda Rowa, Kasha sustained fatal injuries. An explosion shattered her cockpit visor, propelling glass shards into her eyes and causing her death. This sacrifice occurred while she actively protected Lou, cementing her role as a guardian until the very end.