I have a few ideas for Enjolras for part 2, and facing Malicant, but honestly, his biggest, deepest fear is being at the mercy of Malicant again. It was the one time in his life that he felt truly powerless and reduced to begging. Would a scenario where he now literally is held in thrall by Malicant work?

If not, I was thinking something along the lines of an authority figure from his past who he disliked being the one holding the strings. Just literally being controlled by someone/thing else.