Istria with her fosterbrother Achilles. The two are getting along famously and fostermom Mireille does think Achilles is moving more and better now that he has a little sister to chase around.
Achilles has improved his mobility somewhat with the physical therapy and the chasing of the sisters (Martha is also at Mireille's romper room now). He needs a low litterbox and may not be able to manage stairs. But he gets himself on the couch, under the furniture, and definitely onto your lap. He will lie on his back in your lap for ... ever.