From what I remember the story is about a girl and her alien partner who are being trained in a school (in space?) for alien/human bonded pairs.
They share a strong psychic connection and they have contrasting personalities.
They might be trained to either be peacekeepers or for war/protection purposes (not sure).
In the story, they talk about past missions in which they saved something and now the government is thankful to them ( which makes me believe it might be a series??)
Sadly that's all I remember. The focal point to me at the time was the bond between the two. I might have read it in a middle school textbook in the 2000s? Might be the same textbook I read “The Smallest Dragonboy” by Anne McCaffrey. But that's just going off the time period...