He definitely does not double take when he finally spots Jyn, because dresses are a little rare, and her look is very rumpled, but it's very Jyn and very...cute. She looks cute. His pants are definitely wrinkled too because he ran out of time before he could iron them, but his red sweater/grey collared shirt combo is nice enough. Until Sofia spits up on it, he's sure.

He's gotten so used to Jyn scooping away Sofia that he barely even bats an eye, just smiles at the baby's brief startled face before she realizes who's grabbed her. His heart melts a little watching the way Jyn plays, the way Sofia giggles, but fortunately the stupid lovestruck look on his face is gone by the time Jyn settles the baby at her hip.

"Feliz Navidad, Jyn." He leans down to pick up the hat, but doesn't bother putting it back on yet. Sofia turns back to the tree victoriously and reaches out for it, but it's just out of reach. When she realizes she can't touch it, she smacks her tiny hand at her papa instead and he grabs her tiny fingers to kiss them. "She is so excited for her first Christmas. Aren't you, mija?"

Cassian is definitely excited too, although that's hardly a secret at this point. He's honestly the more excited party here, but he can pretend otherwise.