An evil god wanted to turn him into a dungeon master so he would be bound to the dungeon and to make him kill people, but a goddess stops it part way informing him of his death on Earth and allowing him to read the messages his friends sent before telling him he cannot return but, is allowed to live freely with his character's ability.
When he got his arm cut off and as that wasn't possible in the game and because health would naturally recover (though he didn't recover his lost blood) he saw his arm weirdly growing back and though glad he was mainly worried about if hes even human anymore.
She ends up incredibly popular given a nickname as well as being pretty influential, but not in a politics way more like if one knows her and she is close to them they might get a lot of special treatment depending on who, what, when, and where.
To turn them into professional killers. As many know many are scared to kill other people like how some people will hesitate to pull the trigger even on the enemy and overcoming this can be extremely difficult. Now gather people who have no problems with killing others, train them and now put them where you want them to kill others and you know they will kill and if they die you just replace them.
He has an abnormal amount of strength, being able to flaten aluminium chairs with a single stomp and send grown men flying several meters with a single punch, and he possesses a sturdy body. They wish to turn him into a true killer, by giving him no choice but to kill and turn him into a top killer.