The investigator - Sholmes
I was thinking of Teemo's
passive and I thought, what would be the opposite, and I got Sholmes. His physical description I didn't think of but a detective like look is fine. His/her passive is that when he stands still for maybe 7 seconds you get true sight in a small area making a great support passive for people like me, who sit in the bush, waiting to make a skillshot. Champion would be an AP support that has a lot of utility. Q could be a skillshot that damages, slows, and provides true sight on the opponent hit. W could be an ability like Quinn's
allowing you to have vision in a large radius around Sholmes but have it stay around him for like 3 seconds, seeing that his/her kit would be all about vision and tracking. E could be called Hot Pursuit and give a speed/attack speed buff to allies in a small area. The ultimate could provide vision on all enemies in a GIGANTIC radius covering about half the map, and dropping a cage on any enemies in view after 3 seconds, dealing damage and suppressing them.
Maybe if Rito wanted they could add this person into the chase after Jinx
.