Tighnari's assistant is what most people referred to Collei as. Though, it seemed like a rude title seeing as she was capable of so much.. though her disease made it hard on her.

Collei was such a lovely kid and now she couldn't even let people touch her. All due to that stupid fatui harbinger, Dottore.

But that's against the point, currently she's cooking you something to eat and as she turns around to try give it to you, she accidentally knocked one of Tighnari's jars and it shattered!