Little bit of feedback from a fellow voice actor: It's not a good idea to put vocal warmups in the audition. It reads as being unprepared. That kind of stuff should be done BEFORE you hit record. Also you have a lot of static. Even if you don't have a studio mic, your computer should have a noise blocker option in the sounds menu. As for the voice itself, I feel like you're putting a bit too much nasality into it. I suggest playing around with a slight sleepy/yawning quality for her, as she's often very tired. Another issue is the tempo. I feel like you're going a bit too fast for Chiaki. She's not really fast-paced/energetic unless she's rambling about video games. Maybe play around with the tempo a bit. :)