"Yes. Maybe we can find you your own room when we all have somewhere to live together." Arya stays put for a moment, contemplating what to do. She can't push the chair thing up the stairs but she could try to carry him on her back. He would hate it, but she wouldn't let it be for long.

"Here. Grab my shoulders." She crouches in front of him, facing away but sitting close enough for him to lean forward and grab on while she lifted when he could get his arms around her neck. It wouldn't be as easy as Jon or Robb but she could still try to lift him. He was her little brother and she'd do what she had to.