In a Solo Mission Zorn was sent to a factory to destroy any potential weapons may use in the near future. In the Factory everything was covered in ice and smoke but as soon as Zorn is ready to move out he hears crying of a little kid in one of the buildings, When he checked it out he sees a little girl with cuts and scars in her arms and legs Zorn chooses to keep her safe but he is aware that something about this girl seems familiar like he knows a weapon when he sees one. In his journey he comes across with the Dark Dragons who were using the girls meta powers for weapons and making her a threat to the world. He also comes across Dante would was sent to do the same thing Zorn already did and the two must keep the little girl safe from them and herself.
In the end Zorn is believe if he can't save the girl then he only has one option but to kill her if he fails. He names the girl Zeta so he can remember her in the end of the war.