Shiroi Youhei

Going by the alias "Mercenary", Youhei is a freelance digital wiz who can do anything from design 101 to programming 999.
While he had tried out working as a normal company employee, his superior skills and excellence in all fields made him the target of fierce bulling. Since that day, Youhei trusts no-one now and has worked freelance ever since.

Just as his "mercenary" alias purports, he will quickly complete any task with a high level of quality. This has given him an edge on the competition and a name on the internet for the man to go for sudden and urgent job.
It would seem he earns so much that it is odd he lives in such an apartment complex.