Haikyuu: Raven!!

Ravens differ from crows in appearance by their larger bill, tail shape, flight pattern and by their large size. Ravens are as big as Red-tailed Hawks, and crows are about the size of pigeons. The raven is all black, has a 3.5-4 ft wingspan and is around 24-27 inches from head to tail.

Also,
Crows and ravens are both blackbirds, but there are some key differences between them. Crows are typically smaller than ravens, and they have a more triangular-shaped head. Ravens being larger, measure 24 to 27 inches from head to tail and 3.5 to 4 inches for the wings.

Further more,
Both of these birds are extremely intelligent (though ravens seem a bit smarter than crows) and are quite playful. Ravens have at least 7 different calls and can imitate the calls of other birds (geese, jays, crows). They also use stunt flying to attract mates (barrel-rolling, flying upside-down, and somersaults).

And if you do happened to be visited by a Raven,
It indicates that you might be in need of some kind of guidance in your life. However, these birds do not pay a visit to everyone. They're attracted to the mystical aura of a chosen few. If you've seen ravens lately, it means that they have chosen to help you.

And it seems that he is a very close friend to a very friendly Raven.

Also, note from Author, don't piss off ravens or they'll come back a thousand fold and **** on your car like there's no tomorrow.
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Guys, it seems I have been hitting a wall in writting in my other fics so I will try to revitalize my motivation with writing this fic! Let's hope best!