Kristin Van Helsing
Also known as Anomaly UPEP3002
Her background information can be found in Site Demeter located underneath Ardham Hotel.
A player will likely meet her in Ardham Hotel for the first time with a cutscene of her surrounded by zombies. There is an NSFW warning message here and the cutscenes can be skipped.

Side Quest: Containment Breach.
Item: the Bow of an Elf King

She likes:
A female player character takes the shower with her in a certain cutscene.
Be kind to her in Site Demeter after the player finds out about her past.
Do not take Ishida's vampire experiment samples.
Have some naughty fun with someone she likes. Male player characters will need a much higher relationship level to trigger this.

She dislikes:
A male player character peeps on her when she takes her shower in a certain cutscene.
Refuse to tell her why you are in Queensmouth
Try to steal the Bow of an Elf King from her when she does not like the player character enough.
Being a very bad person and saying terrible things to her after finding out about her past. It may even trigger a game over if she goes berserk and kills the player character in rage.
Take Ishida's vampire experiment samples.

https://youtu.be/fvXVZSRsE_g