[Mreaper]

Well, even though Shawlong was pretty humanoid, he was also a lot smaller than in his previous form(well, proportions would have gone to hell otherwise), but I'm just saying, you can't really judge by released appearances, as their original form could have been much larger and thus not "about the same size as a human", as Hitsu says it.

Plus, add wings to a humanoid and they're still a humanoid, though a humanoid with wings.