Well that was one way of making things awkward quickly, and Tear looks immediately apologetic for it. To her understanding it wasn't her fault in the slightest, but to forget someone who greeted her the way Yuna had? It seemed wrong...

"Yuna. It's a pleasure to meet you, I don't think it's necessary for me to introduce myself again." ... Maybe that's not the best jab at humour ever...

"Then you have already encountered a situation like this one before?"