I've never really had fully dedicated platonic/familial F/Os before without them being connected to a romantic F/O. I have all my MHA friends and family, but they come from a wide net with Toshinori at the center. The threads from them connecting to me only after first being connected to me by Toshi.
So since I found myself getting attached, I started going over parts of One Piece I had no context for due to the way I started it-- first seeing film Red, then watching the Netflix series which basically encapsulates all of what I saw of the 4kids version when I was a child, then reading a quick summary and handful of wiki pages sent to me by a friend, then doing what they recommended and jumping in at the beginning of fucking MARINEFORD-- I'm listening to a fully blind breakdown of the manga and things it includes that I've missed through the anime, I'm just here breaking down right along with the Straw Hat family for the 3rd time over the death of The Big Brother. I don't think I can deny anymore how fully invested I am. I haven't felt this strongly since I got into My Hero Academia and incorporated it into my personality. I don't feel overly romantically inclined towards anyone but one character I'm actively avoiding learning too much about, but my entire soul is invested in the journey all the same.
I think I'm one of the straw hats now.