Her Personality:

Cala Maria seems to be a flirty and vivacious being. She appears to have some interest in Cuphead and Mugman, as seen in her intro where she makes a sweet "yoo-hoo!" sound while fluttering her eyelashes and making a pose, and in the ending sequence in which she is staring at the brothers (although, as a siren, she could only be doing it to catch them off-guard as well). Her first phase death message only helps support this. However, she seems to become more cruel after she is forcefully transformed into a gorgon-mermaid, due to electric eels biting her hips and shocking her.

Cala also seems to have a strong connection with fish and aquatic animals, as she can summon them at will to help her, and also use the fish as weapons without them apparently caring much.

Try to think about on what she might sound like in the Game.