Penelope Vargas
She's determined. There's no other word for her mood. Penelope has been practicing so hard, though almost entirely alone, and feels absolutely ready to take it on. There was never an issue with her skill - she was always a good Seeker, it was her shit ass attitude that kept her off the team. But being out of practice for so long has definitely taken its toll - after the first game, she's lost all the confidence she had carried in with her.
Before and after, she doesn't really talk to anyone. She's focused, she's doing her best to be a good team player. She tries to encourage her team after the first game, but she doesn't do a good job. You can tell her spirits are really down.
This meant the world to her.
And then after she loses the second game, Penelope knows there's no hope. She had one job, and she blew it both times. Both games she was unable to get the snitch over the other seekers and knew the losses were entirely her fault. Penelope can't even handle it - after apologizing profusely she just leaves in tears.