User blog comment:Theteamlover/Tula' s Death/@comment-76.177.247.82-20130106190338

Perhaps Tula was a large part of a later plan, and in the heat of battle, O-M lost it and killed her.

Then, maybe when Kaldur found out about Manta, he was supposed to turn and have to kill the girl he loved as proof of his allegiance.