Yeah, Haru is basically an OC insert and does feel that way but I don't mind em since you can always choose to not interact with him.
Viewing post in The Spirits of Sabil (+18) comments
I don't mind Haru much as a character myself but my big gripe with him is his story contradicts the lore of Ori and the blind forest kinda hard and the fact he has a special birth origin and spirit power. Trying to work him into say a fan story is not easily done due to this. Other than that he isn't bad