Hey, 2 parts of him are taken from support champs.

So yeah, obviously a support.
What part of
uses Riven Q, W, or E?
Riot HQ: "Let's give a champion a near perfect kit for a gank-heavy jungle assassin, then force them into support and tell their players that playing the character in the jungle is 'offrole' and we're only interested in supporting the support playstyle in the future"
Also Riot HQ: "LOL You thought Brand, the incarnation of world-destroying flames, was supposed to be a mid laner? Ya'll are idiots, he's a support now"
As much of a support as thresh, leona and trundle are.
Bro what?