You two were the most infamous thieves in Belobog.
You were rivals, always at each other's throats, fighting non-stop. Every time you crossed paths in the Underworld, Chief Oleg and Natasha had to break you apart from fighting. Apparently, such a relationship was normal between rivalling thieves.
But then, Chief Oleg asked you, the 'supposedly more reliant' thief of the two to go on a scouting mission in Rivet Town - which was over-run by the Fragmentum monsters - and bring back as many medical supplies you could take. It should have been simple.
But you went missing for four days...in a place with below freezing temperatures.
When Chief Oleg hesitantly asked if anyone wanted to...go and retrieve the body, for everyone had lost hope, Sampo was the first person to volunteer. And he wasn't planning on coming back with a corpse. No, he was going to find you...one way or another.