I get this feeling that Barasu obtained that Darkness Attribute because he might of been cursed from the Jealous Witch Satella when he first arrived in this world. Although it seems that every time he tries to either try and foretell wants bound to happen with either Beako, or Rom and Rem, or just explaining his special ability to anyone pretty much makes it where the scent of the Witch is upon him. I kind of wonder if he'll ever meet the Jealous Witch at all now.
Also, with him overdoing it for Rom and Rem's sake pretty much might be the only way for everyone to survive that night.
Also, with him overdoing it for Rom and Rem's sake pretty much might be the only way for everyone to survive that night.