Tosk

Tosk - The False Infection
Lying Void. False Glow. Lacking Nail.
^{Falsely infected, they survive by pretending they are mindless. Scaring away threats that flinch away from True Infection.} 

Tosk is a rather early vessel. So they have age over some of the others, and they know how to hide. Fighting is just something they refuse to do. When given a nail, they would "lose" it. They focused on avoiding danger all together, how to not get into danger and how to dodge it. They are weak anyway. Any strike that they did do could hardly crack a mask, with or without a nail.

They did have a different skill. Something they kept hidden for a long time, a charm that was stuck in their form, a charm of False Light (allowing them to send out a substance that mimicked the Dream Plague). So long that when it was found, they were thrown out. They had this glowing substance that they could control. It is a vibrant orange, glowing, and had a similar texture to something very terrifying. They used this skill to hide among those that were mindless. To keep themselves safe.

They entered a few combats and used the lights to confuse and baffle their opponents into spike falls or natural dangers. They nearly did this to a fellow vessel. But turns out Colie didn't fear infection, so they ended up actually knocking Tosk around. Tosk blacked out and woke up with the angry hook wielder glaring down at them. Turns out, they had left home and were traveling too. Tosk stays with Colie, cause Colie was a much stronger lost Vessel.

Then they came across Bat.  who they found after encountering a large insane bug. Bat was been the turning point of that fight. Which Tosk knew would come in useful. They are fond of Bat, for Bat is an interesting oddity. And Bat could come in handy, they did save both their own and Colie's life.

They travel in a group. Safety in numbers, right?