User blog comment:Jkphantom9/Volume 3 Episode 9 Preview/@comment-26389992-20160114030502/@comment-24994749-20160115001327

It's always possible that Mercury didn't precisely love his father but they did have a functional relationship as teacher and apprentice. So Mercury didn't necessarily feel bad he died but neither he had the emotional attachment to Marcus to feel sorrow on his death.

The way he spat at his body could be interpreted as disappointment. "Look at this guy under whom I trained because he was supposedly stronger than me. Yet here he is, I survived something he didn't."