Did she or did she not kill Felice?

"Does he know that you're after Hera Cruel because your beloved grandmother killed Hera's mother? That she has all the reasons to come after your family? And she's actually the victim here, not you or the Zhu Family?"

Axel did his research when Heaven confessed to the truth. The truth was not easy to believe or even accept. However, since that explained many things, Axel's interest in who Hera Cruel was consumed him. Aside from the crimes his legal team was still working on to find a loophole, Axel found a thing or two about Hera Cruel. 

She was the daughter of an infamous man named Vicenzo. He, however, died of natural causes. Her mother, on the other hand, was murdered. Although the information he garnered wasn't enough, it was enough for him to put things together. And it was also enough for Axel to know how much Hera's mother's death hurt her.