Revelations: Persona (PSX) - Pandora (Final Boss) 

Second phase at 13:30
Oh, could this be a hint at an upcoming video? ;)
If you're wondering why I'm putting some of my characters to guard during the first part it's because I didn't have the protagonist's "BossDamage" ability, which does a lot of damage to Pandora. It was safer to grind for it during the first half of the fight rather than risk it during the second.