User blog comment:AssassinsTears/Episode 23: The Welcoming Committee (Review)/@comment-211.30.164.139-20120325073356/@comment-4750954-20120327041041

lol, I agree. I haven't read up to the point where Alluka is featured, but I know he's the fifth Zoldyck kid... in all fairness, his name wasn't revealed, and it was mentioned in the manga that there were five Zoldyck children... so were were all left wondering about the fifth one anyway. However, the way that they totally ignored Alluka's existance for the first part of the series is disrupted, so I can see where you're coming from. ^^