I would like to offer Demon to help with Danae 'accident'.
He would happily fight..... and I can even see him leaving the stallion blind on purpose... saying something like = 'the last sight you shall ever see is me!' before using his large teeth to tear or his hoof to bash......
We could use RNG until that point, and when we think they have had enough fighting we could have Demon make him blind.....??
Also.... I am happy for him to meet Calibor. Calibor could steal something from him -we could discuss what- but either way Demon HATES it when anyone touches what is 'his' he will go after Calibor and he will not rest until he had what belongs to him back.
If we make it so that Demon is busy -and therefore can't hang around to punish him properly- he will likely just kick him once, or use his teeth to tear his rump just to teach him a lesson on who not to steal from.
This could be set when he starting out? Maybe he was a little sloppy back then?