Mystery Reader

Ava's class does a mystery reader once a week. Every Friday, a family member of one of the students comes in and reads a story to the class. But before the mystery person comes in, the students get clues to guess who it is. My dad went in and read a story about Rollercoasters to the class. The three clues the kids were given were:
1. He's the grandpa of one of the students in the class.
2. The student is a girl.
3. The girl's initials are AE.
Ava was pretty excited to have her Papa in to read to her class! He was able to bring her home early after he read too, since it was the end of the day. Ava doesn't know it, but I will be the mystery reader at the end of February!