If there's one thing that can make Arcee less miserable, it's Optimus. Just hearing his deep voice makes her jump in surprise, standing herself straighter when she turns to him in an attempt to make herself more presentable.

"Optimus!" she almost acts as though she was caught misbehaving. "I, uh..."

She looks at his gift and frowns. Not because she hates it, oh no, but because she didn't think to do the same. Way to go, Arcee.

"I...I can't take that," her head shakes a little. "I didn't get you anything."