Not A Clone

Torvald clenched his hands, trembling in pure anger as he faced Jolnir. He knew Jolnir had always meant to say these things – that they could exist without causing trouble to each other and just lived according to their own principles if they even had different ones. In the first place, they had one soul and identity. It just happened that it was split into two, giving more freedom for Jolnir to move and act however he wished.

As painful as it may sound, Jolnir absorbed all the negative energy Torvald owned in his previous life. His heart wasn't pure in the very first place. But what little purity it had was all given to Torvald in this smaller form, while the rest were all given to Jolnir.