Now, there's someone Cassandra would remember if she'd met. Primarily because Ahsoka is an alien, but still- she has reason to want to introduce herself when she puts things together about who Ahsoka must be, seeing her from across the room. Rex certainly seems to feel something about Ahsoka being here, and obviously considers her fondly- although, Rex being Rex, Cassandra can't always tell how exactly he's feeling. Sometimes she thinks Rex doesn't know how he's feeling.

In any case, Cassandra's always eager to make some sense of Rex's life in his own world. When she approaches, holding a mug of coffee, she doesn't exactly look traditionally friendly (she's bad at that), but there's interest in her eyes.

"You're Ahsoka, right?"