Weird player O.O

If this is something totally obvious, I'm sorry. I've only been playing for a few days and I'm not familiar with everything

So I was playing a Co-op vs AI game and this one player followed me around the entire game healing me and helping killing the Ai and minions. I tried to talk to them a few times (asking them if they were new and whatnot), but I don't think they were actually playing... When I moved, they moved. I went by the dragon waiting for my teammates to come help me kill it, and the person who was following me went inside the circle part that the dragon was in. They got stuck and just kept running into the wall and wouldn't run around it. So here's what I'm thinking; the player somehow must have had the champion follow me and heal my champion when it got low health. It would recall when I recalled even though it was heading towards me after spawning (because they died) From the start of the game, it just followed me and did everything I did (Except teleport to turrets)

Again I'm sorry if it's something really obvious, I'm a new player -Choni