To be honest, the only reason Taako follows Barry around in the unnamed AU is probably because Barry shared one small snack with the strange, quiet assistant of the director.

It's sort of like feeding a stray cat. You feed it once and suddenly the next thing you know it's following you everywhere.

He can't say a single word but Barry can just tell by the subtle changes of his vacant expression that Taako likes to mooch treats when he can.