[quote=@Prince of Seraphs]
[@Forsythe][@Multi_Media_Man] Hey before I respond I wanted to ask. The weird monster shadow thing with Diamond's arm was that a result of her semblance evolving or exposure to the weird grimm/human hybrid things they fought on their last mission. Is the trigger emotional?
[/quote]

It's her semblance acting up. From what I understood the thing Hari came up with is instantaneous and more violent. At the moment, Diamond can not really control it to any usable extent so I suppose it does trigger emotionally atm.