Althemia is a playable character in Dragalia Lost.

Official Description

A young woman who's shy around new people. She speaks at length about her research but is otherwise inarticulate, and she often acts snooty to hide her embarrassment. Though passionate about her research, she lacks social skills.

Official Description (Halloween Althemia)

A passionate researcher of black magic, Althemia had always longed to wear a vampire's garb, and spent many a night sewing this costume. It seems no change of outfit can hide her tendency to go all in on her passions.