Melmarus is an adventurer, treasure-hunter and occasional bounty-hunter. She is the partner (in life and business) of Serick, and they roam the land together hunting for loot, taking commissions from people not strong enough to go hunting for their own treasure, and kissing cuties.
In battle, Melmarus is unexpectedly brutal – most land dwellers don't take her seriously until it's too late, because she's a little ungainly on land and her non-combat persona is disarmingly nice. Melmarus is the person in a group who says 'keep going, I'm still listening' after everyone else has stopped paying attention.
Agriltheans who live on land will periodically exude slime to keep their skin in good condition out of water. Melmarus' is colourless and smells of seaweed. Like all agriltheans, Melmarus is monoecious (like Earth gastropods). Melmarus chooses to use female pronouns because her beloved Serick does too, and Melmarus wanted to be like her friend.