Tsukishima: A DINASOUR!!!

Oikawa: Sparkly trash/trash can (With a crown on top-) or an alien (Since it is practically canon that he loves aliens)

Iwaizumi: A gym-instructor that is has a part time job as the garbage man or a man abducted by Oikawa, the first alien ever seen/discovered.

Kuroo: A black cat with wierdly shaped almost hair like fur (Symbolizing his hair) and a kuroo like smirk. (Cause he IS Kuroo.)

Kenma: A white cat with blonde (the same shade as his hair dye.) or black spots and wierd pudding-like extra mane (?) on his head.

Bokuto: A day owl that lives in the city in a house with an owner who loves volleyball. (Who has to deal with the energy and mood swings Bokuto the owl always desplayed.)

Akashi: Bokuto the owl's owner or Bokuto's night owl best friend who gets less sleep cause of constantly owlsitting his owl best friend.

Ushijima: Oikawa's alien 'best friend' who insists to going to his planet instead of earth. (You should have gone to Shiratorizawa (The planet))

Kageyama: A volleyball

Hinata: Short (I'm sorry Shouyo i love you-)