Odetta is a character from Dragalia Lost.

Official Description

A traveler in search of new worlds. Proud of a forward-thinking attitude that sees her always moving forward, she's not terribly worried if others get her. Though she sports a classy appearance, she knows her way around a fight.

Official Description (Halloween Odetta)

The traveler Odetta, dressed in a spooky Halloween dress. Her latest adventure goes beyond the physical and into the world of the mind. Whatever will she discover there?