Damian defends the Red Hood. the family doesn’t know why, but it’s concerning. what reason would their youngest have to defend a crime lord? there must have been something more to it.
even after the identity reveal, Damian refuses to step down. the moment he perceives the family as being unfair to Jason, the moment they seem to overlook him or brush him off, Damian will be there to tell them off and remind them that, actually, Jason was talking first.
what’s probably even more dumbfounding to them by that point is that Jason lets it happen. it forces them to realize that Jason hardly fights for himself, to be heard or acknowledged. and for those of them that had been there when Jason first joined the family? it’s a painful reminder of the skittish boy they had first got to know
Damian takes his duties of brother very seriously. when Jason first joined their family back in Nanda Parbat, his mother had been very clear when explaining to him that his brother was in no state to speak or stand up for himself due to his catatonic state. Damian had made it his mission then to not only defend but also promote his brother’s interest. it would be unbecoming of him to let anyone diminish or take advantage of the more vulnerable member of their family until he could do it for himself
except that time never did happen. Damian still jumps to Jason’s defence at a moment’s notice and Jason still gets a little choked up when he gets to witness how protective his little brother still is of him