Night Shift

Alexander Lancov, formerly a nervous Russian student, is employed by the Leader-Kin as an enforcer under the codename "Night Shift", crrently serving as a leader of the Scavenger Squad reconnaissance team.

Backstory
Alexander was a normal, overly-nervous student, spending long nights trying to squeeze another useless bit of info in his head, so pumped with nootropics, sleep was something of a wild fantasy. And then the virus hit. Pills interacted with it in a strange way - now taking them would increase his strength and speed. But the best happens at those long, dark nights. No longer a mere student, but a horrible monster in the shape of man, Night Shift stalks the city.

Lack of sleep and natural curiosity forced Alexander to experiment with different types of nootropics. Results varied from promising, to unsatisfying, to simply dangerous.

Fun Fact
Alex still had to take that exam he studied for. He got off with a C.

Powers
Night empowerment- due to his habit of studying late at nights, Night Shift feels much stronger and generally more comfortable during nighttime.

Chemical mutation - due to the influence of the virus, taking nootropics makes Night Shift experience a "Hyde effect" - his strength, speed and agility increases, at the price of his morality. Taking different drugs results in different length and strength of Hyde effect.

Personality
As a side effect of his powers, Night Shift exhibits different traits depending on which form he takes.

In his normal form, Alexander acts like any sleep-deprived person of his age would - somewhat lazy, rather well-meaning and constantly trying to crack jokes.

In his powered form, Night Shift demonstrates sides of himself usually hidden from the naked eye - arrogance, paranoia, excessive cruelty. Under the Hyde effect, he is prone to mood swings, going from bloodthirsty brawler to a brooding philosopher faster than you can say "brooding philosopher". While not specifically moral, there are some lines he is not willing to cross, even for the greater good of Leader-Kin.

One trait is present in both forms though. If absolutely necessary, Night Shift is willing to do whatever it takes to solve the problem at hand, completely exhausting himself. Oddly enough, this same trait is what got him in this whole mess one of those dark nights.