Fluffy is the Artificial Intelligence that controls the shipboard computer of the FSS-CH9. Like all felinoid smartships, the neural network that forms his AI is sentient and capable of independent thought, learning and emotion. This design is intended to make the smartship feel a kinship with the team by causing it to consider itself a member of the team. However, while most smartships become attached and protective of their crew, the constant danger that the CH-9 tends to face through the team’s relative inexperience and general recklessness has caused Fluffy to treat them with some amount of disdain. In particular, he is rather antagonistic of Damsel and Sarah, whom (as pilot and engineer) he blames for the majority of his perils, and Andrew, whom he considers to be an inferior artificial intelligence.
I’d be wary about the “Twin ship” power-up. Two Fluffys equal a LOT of hidden snark.