He could be angy all he wants. Now they were on his bed and beckoning him to join.
They don't say it, but a warm body feels nicer than having a snack.. so Iso preferse it if he joins, quietly.
Iso would just hold a finger to their lips to shush the rodent like they had seen others on the surface do before.
It was nap time so if he is quiet Isopod will let him join.
Otherwise they'll have to make him be quiet. Tongue tastes especially good to the creature of the deep.