Sebastian was a beloved player who saved the Fridays from a dangerous entity before joining the hallstars so they should get at least a little recognition for what he did with the hallstars.
My initial proposition is that Sebastian could tell the Peanut was a threat so left watch of the islands quietly to join the Hallstars. Upon becoming squidish their form took the shape of a cuttlefish which continued to shift colors. When fighting the Peanuts they attempted to sooth the other players with their shifting colors & sounds to little success as they were one of the worst players on the Hallstars.
After the fight they were Released by the coin where they have since returned to Hawai'i where they enjoy spending time in the ocean, watching games & continuing to look after their team alongside Our Lady of Perpetual Friday.
