Icy is from a visual novel called Wizardess Heart.

Background:
Icy is an orphaned girl who lives alone in a small village in the mountains called Reitz. As a child, Icy lost both parents to an epidemic that swept through her village. Consequently she was raised communally by other villagers, and views them all as an extended family.
Icy manifested magical abilities unexpectedly at the age of six, gaining the ability to cast spells as well as a special ability to speak to animals. In the village, she used her abilities to act as a sort of magical veterinarian, speaking to animals to figure out their problems before casting the appropriate healing spells on them. The villagers viewed her as a dependable and reliable wizardess, but in reality, her magic tended to go haywire whenever animals are not involved.

Season 6 Onward:
Icy is portrayed as a grown woman. She doesn't have a buddy and is focused on her as a prefect candidate or in her prefect duties. She's shown to have surpassed her Fortitudo class and she even asks Yukiya and Elias to be her deputy prefects. She's more powerful and skilled with her magic and therefore she's looked up by other students. In season 6 she was recommended to be a Prefect by Klaus II, and she officially becomes one, even giving classes to her former classmates. Despite maturing, Icy still is kind-hearted and loyal, often putting the needs of others behind her own. She always sees the best in others and is still selfless. However, she can be very dense especially when it comes to her own feelings about her love interests. She is a capable Wizardess and is no longer the clumsy girl she used to be in the prior seasons. 

The protagonist is currently 19-20, and gets older as the seasons go by. By season 11, she will be around 23-24.

Voice: Medium to mid-deep range

Example #1 

Example #2

Example #3