Idris

Idris is the leader of the rebellion in the prison and Skull's closest friend. She only knew Hatty in passing, but that didn't stop her from naming her rebellion after him. She wants nothing more than to free Hatty Hattington and all the prisoners from the clutches of the cats and go home. She is compassionate, brave, and patient. She recruited Percival into the Hattingtons because all the gems and yarn he is able to gather and distribute helps out many prisoners. She is frustrated with Skull's hatred for him, but she understands it to an extent. 

She uses her toxic bubble ability to write on the walls and spread her message. She is hardworking, and is a great booster of morale, which allows her to recruit more prisoners. She is terrified of potential moles revealing all her plans to the cats, so she only has a small inner circle. She is hopeful that Hatty is still alive, just stuck in a dormant state.