Honestly, It's Kiriyama who is too dense. I mean Hina showed multiple times to him that 1) If anything, she's only interested in Takahashi-kun (he helped them himself) 2) He doesn't really think of him of anything other than a family . It jsut doesn't logically follow. I feel like the author...
@tsunamininja just wanted to say this. I've definitely imagined his lines with Hisoka's seiyuu, when he climaxes while fighting with Gon xD I hope he gets voiced by him in S3 of the anime (if it ever happens).