I'm not sure if this belongs here, but I've been seeing this guy pop up a lot on /r9k/; maybe someone here has some information etc.
His name is Oscar and he is from Stockholm, Sweden. He sometimes goes by the name Eric and has also been saying that he is from Germany.
He is 25 years old, a NEET and spends his time on lifting and being obsessed with mentally ill girls. He also enjoys anime a lot.
He baits them with his 'mysterious' behaviour, manipulates them before they eventually send him nudes. Some say he also meets up for sex before then turning on them, insulting them and then fucking off.
Here's an archived thread with a lot of pictures of him and some (anecdotal) statements where he posts aswell (with confirmation picture):
https://desuarchive.org/r9k/thread/32420752/And a few logs he had with PoisonIvyLul:
http://desuarchive.org/r9k/thread/32309506/ Sadly no social media links because he seems to be pretty careful about that stuff.