Roanoke

Roanoke is a Liquid Fountain Collector that currently works as a medic at Splash Mountain Colloseum. Prior to that, she had been a popular contestant in the arena, known as "Scylla, Terror of the Ring."

That ended when she contracted the Phlegmming, a disease that can affect Fountains, during a dangerous match that occurred. Though potentially fatal, she had it treated and was cured, although the resulting trauma affected her deeply.

Personality
She is

The subject she is driven to collect is "blood", which is a rather difficult one to have.

Walker
As a result of of contracting the Phlegmming she has become a germaphobe, resulting in her walker having a pod design which completely encloses her inside it and uses a filtration system to keep the water immaculate.