You can arouse Arihama like every enemy, Arihama's HP is 7500 and lust bar is 300 But filling the lust bar only LURES the enemy turn to focus on your main character so your rooster of the frontline crew will damage it slowly.
Teasing him and filling the LUST BAR also will NOT make Arihama die or be defeated. You need to damage him through series of attack, skill, and item damage (the highest is from the item from the side quest).
Only the mc can give higher dose of damage.
Note: Arihama will rise again after FIRST DEFEAT. The best way to defeat it without the frontline crew being killed is to damage and defeat Arihama in the shortest amount of turn possible.
Note: In that battle, you can only control the MC. The crew will attack synonimously in the boss battle event. They will employ strategies depending on what you choose them to do.
Skru'Vaks - can be offensive or defensive (lore chosen by you). This character will not die along with Feraldo who choose to flee if the battle prolongs.
Hakkon - can join or not (depends on your choice) (this character is the most likely to die in prolong event of the battle.)
Riordan (NPC) - can join (depending on your conversations with him.)
Bradley - (he is part of the auto-frontline, the less you do the side quest, the higher chance of him dying)
Rylan (Theoretically) - since you can kill him in the event prior to fight Bradley (Pirate Main Quest). He is killable. (Likely, he could die in the prolong battle with Arihama.)
Cicero (Theoretically) - he was considered the weakest by the game's lore, and according to Arthur and Bradley.
Phoenix (Theoretically) - another hired crew on Akra. A cyborg. (theoretically could also die in that fight.)
Non-fighting crew were, Katari, Alastor, Arthur, Sammuel... (so they were safe to say the least.)