Arcee had to figure it was some kind of non-organic, and definitely not Cybetronian, but she's never seen anything like a geth terminal before. She doesn't put her blasters away just yet, optics slightly narrowed as she looks him over.

"Geth? Never heard of them." Her voice is a little tight, terse. She's obviously dealt with a lot recently. "Cybertronian. Name's Arcee. Why did you request a rendezvous?"

Maybe a little abrupt, but to the point. She wants to know if Legion's friendly or hostile before they proceed. They hadn't exactly offered the universal greeting, after all.