Root Abyss Boss Mechanics

Pierre: Honk
Red hat: Only blue hats can damage him, red hat wearers heal him.
Blue hat: Only red hats can damage him, blue hat wearers heal him.
Purple hat: Everyone can damage him.
He will target a member of the party, transform into a fiery tornado, and chase after them. When he hits them, he seals, so bring holy water. The trail of fire left behind him also deals a decent amount of damage.
Pierre will also teleport around and use an OHKO attack that has a delay before it activates, so if you see the animation where he's kinda' in the background surrounded by black smoke, move away, because he's going to try and backstab you with his umbrella.

With that gameplay, I think HoNk does describe it perfectly.

Please tell me he Honks around too.