User blog comment:TheNewProtagonist/Vol. 2 Episode 3 - And everyone's brains exploded./@comment-6830001-20140811010905/@comment-96.254.157.84-20140811011455

It's the shirt - looks like the one Aizen wears after he betrayed the Seireitei. Wonder if that's an intentional referance. Like how Blake betrays the White Fang just as Aizen betrays the heroes.