Yes, he is. I mean it. After finally getting over the loss of Lockon and the others four years ago, she started to really develop feelings for the Gundam. Yes, he is Gundam. |D It doesn't hurt that they're about the same age and used to be the youngest members of the team. He also grew up into a damn good looking man. She just won't tell him that to his face, she's way to shy.

Lockon may be alive here, but she's realized that he's more of a big brother than anything else.