Fake players?

Hello everyone, I usually spend hours in the late evening just playing pick up games on Pro-Clubs Rush game mode.  I have noticed some weird behavior from other players that are in the same match as I’m. Can they be fake accounts, bots, or players utilizing user names? I’m fairly new to this matter, I haven’t looked deep into the topic but it really creeps me out. Last night I was playing with 3 other people and they all had the same character features (identical) but were 3 different accounts. Are these bots portraying to be humans?