KHUX training stage Boss Beaten in 1 turn

Congrats your basically officially stronger than me.

I'm missing a lot of New Medals this year KH III (Demyx, Vexen, Saix B, Xemnas, Marionette, Patchwork Animals, Rock Troll, Renewal Terra and Xion, Lea (Axel), Yen Sid, Dark Riku (SN++) Vanitas, Lingering Will, Ansem the Wise, Piglet, Leon Yuffie and Aerith, Berserker, Gambler, Sorcerer, Roxas (SN++), Strike Form, San Fransokyo Sora, Sora Riku and Kairi (SN++) Master Eraqus Sora, Sora and Riku (SN++) , COM Ansem, FF7R Cloud (The 4th and Final one of the FF7R Medals), Illustrated Sora, KH II Xemnas (SN++ Both A and B) Key Art # 23 (Dream Drop Distance Sora and Riku) and Illustrated Zexion

Why did you choose to use Aerith instead of Ian in slot 1?