Wow, lot in this chapter. Sometimes the wait doesn't give us much. Other times it gives us a gem like this.
For one, defeating the earl will bring about the heart or something? Was Mana at this point in time the host of the heart perhaps? Not sure if it would be possible so it might not be true at all seeing how dark matter and innocence don't like to play nice but if it is dormant maybe it's safe? Hard to tell really since those words were quite vague.
As for Mana here, even grieving risks bringing back the Earl. It shows a massive different side to this scene from long ago when we first saw it from merely Allen's perspective. Rather than a man who has lost so much he can't cry anymore, we instead have a man so broken but can't afford to even grieve if he wants to keep a hold of his human self. Still waiting for the eventual answer on how Allen brought back Man as an akuma but I don't doubt that we will get an answer one day.
I am wondering though how it will show the scene when he starts calling Red Allen. Whether it is a means of coping with the loss by ensuring that "Allen" isn't dead to keep the Earl at bay or whether he truly did go mad and forget.
Finally Cross there at the end. His look when he saw Red with Mana. It looks like he immediately realised who he was and what it meant with the two being together.