Name: Fionn ap Howell
Age: 11
Tier: still in school
Ability Desired: Empathy (volitile)
A Detailed History Behind Said Ability:
Being a muggleborn, nobody can really say who Fionn inherited this ability from, just as they can't say who he inherited his magic from. Maybe he didn't inherit it at all, maybe a passing witch or wizard passed it on to him.
Fionn's empathy varies from the regular form in that it appears to not only allow him to experience the feelings of others, but is also plugged directly into his magical defence mechanisms such that after a surge of strong emotion or when in the company of many people with conflicting feelings his magic becomes difficult for him to control.
Whether this is because the empathy actually does have something to do with his own magic, or if he is simply extremely sensitive has yet to be determined. However it can lead to random magical outbursts, similar to those experienced by small children but on a much larger scale.
Obviously, these immediate concerns make Fionn's mood, or ability to sense the mood of others a secondary consideration and so far, he is completely unaware he even has an unusual talent. Being muggleborn, he wouldn't even know not all wizards can do the same thing, anyway. Though he will probably shortly find out.
For plot purposes, Fionn's empathy can work as either a tool in making threads more interesting and lighthearted (oops! exploding magic!) but it will also contribute to his personal plot since Fionn won't see empathy as a gift and will want to get rid of it, but will face many personal and moral dilemmas about whether he ought to and how it would change him if he did.