All three have their own singular attack and they simultaneously attack the player. Their attacks are:

Ol' Ethan leans backward, then falls forward, spilling his contents, which covers the entire ground, forcing the player to jump.
Ginette sends Olive Bat out. It shoots its eyeball at the player. Some of the eyeballs can be parried. She can only summon three olive bats at the same time and they can be defeated. Hitpoints = 8/8
Rumulus opens his lid and erupts the rum fluid inside him into the a