OMG this is SO GOOD!!! My working theory is that....
<warning: might be a spoiler>
.....Harlequinn is actually in love with Pierrot?! since at the beginning he asked to switch the red ticket with his green ticket instead of just giving us the green ticket and disposed the red ones. Also, both in the theatrical show and in the mirror flashback thing, the green one (harlequinn) seemed to find joy at killing the pink and the yelllow (pierrot) is ended up in despair because of this...? This is mostly based off of the narration in "Forbidden Love' theatrical Jester was showing us lol idk, but I've enjoyed everything so far. Thank you for making this!!