Asuna is a kind and helpful individual who, like Kirito, refuses to abandon anyone in need. She takes the game very seriously and is focused on clearing it as soon as possible. She is described to be somewhat prideful, and is unafraid of dueling with anyone who challenges her authority.
This cosplayer is really beautiful. The lighting was a good choice for this shot too, and that sword looks very nice as well! Thanks to Gina for sending this in!
Source: SAO 52pk