Talk:Three Heroes/@comment-216.226.127.180-20171004144729/@comment-2602:301:77AD:9270:1BE:379E:9FB7:76DB-20171004152527

Arth is not a member of the Three Heroes, he's the king they served. The fact that he's not considered a member in-universe should make that clear enough.

Elluka is the member of the Three Heroes, not Levia or Behemo, so even if he counted he would only count as one of the constituent parts of Elluka, not as a separate person. And it's noted that he was dormant at the time besides.