"Hey, um." Cosima ends up walking beside her at one point, leaning a little on her walking stick but keeping pace. "I don't know if you remember from the snow fight. Cosima." Team Violet, hooray? "Ruby talk you into this too?"

It's a light joke - Cosima had volunteered, though Ruby's involvement had helped convince her it was a good idea. (That... held true for the snow fight too, now that Cosima came to think of it.)