Geoffrey Hoster was born somewhere in southern England on the 8th of November 1994. He went to a boarding school and had many friends. As he grew up, he became quite shy.
When he was 11 years old, he was out to dinner with his parents. He went to the washroom where he looked into the mirror. Suddenly, his hands started to slowly fade away. After about 10 minutes, both of his arms were completely invisible. He started getting worried and ran out to tell his parents. By the time he arrived at their table, only his hands were invisible. His parents sent him to the doctor multiple times, but they never knew what was wrong with him. Even with this, Geoffrey was never affected by it and he was in no pain. He learned to manage his new power just a little bit, but sometimes, it could still just randomly turn him invisible.
His parents drove past the academy one day and Geoffrey received a pamphlet to the academy. His parents supported his powers and he, without hesitation, went to enroll at the Academy.
Geoffrey is friendly guy, but is quite shy. Although, he does have an outgoing personality around those close to him, such as friends and family. He's not afraid to speak out and does not have a bad temper, so he usually forgives others easily and hardly gets very angry. He is also quite athletic, can blend in (duh, he can go invisible), and is very skilled with survival, traps, etc.
Hard impact on his body disables his invisibility (example: When he gets knocked back really hard while in his invisible form, he turns back to normal and stays like that for a few minutes before he can turn invisible again.)
Although he may be invisible, you can still hear him and smell him. He's quite clumsy, so he's bad at sneaking and can be heard/smelled even in his invisibility form.
If Geoffrey gets way too dirty, you could see him because dirt, mud, dust, etc. cannot go invisible.