Marianne is a famed exoskeleton engineer in Teatan kingdom. Teatans are known for their wits and adorable appearances - with cute animal ears and child-like height. Marianne isn't exactly a fan of her size. But instead of sulking over it, she builds weapons bigger than anyone.

She is a one-in-a-billion genius and she knows it. She is a perfectionist and a workaholic. It's not unusual for her to be stuck in her workshop for days without responding to anyone.