User blog comment:Godisme/erosion/implosion/@comment-919115-20110616020520/@comment-3290324-20110616021322

He's not their cousin. Ichigo didn't recognize him, and according to Yuzu, they haven't seen eachother since someone's funeral, and i'm pretty sure Ichigo would've remembered that, and we already know that Tsukishima's fullbring alters memories in some way, so yeah, it's his fullbring at work.