Wombat

Wombat is a creature that came to Earth from a faraway planet. It came to the planet with the mission to fill it with love and is responsible for enroling unwillingly the 5 protagonists into the duty of Battle Lovers. Wombat is not its true name but a nickname given by the Battle Lovers because not only it looks like the animal the name references but because its true name is not understandable. To fit in with society it uses the schools homeroom teacher Mr. Tawarayamas dead body as a sort of shell it can control at will and can prevent its decay so long as it stays nearby. The boys call him Wombat given that his name is untranslatable. As for season 2 he no longer minds it even referring to himself as Wombat. Besides being one of the leading figures in the Binan Koukou Chikyuu Boueibu LOVE franchise he also had an appearance in episode 5 of the Robihachi anime where he is the feared Boss of the underworld of planet Haccone. As these anime mostly share the same producer Pony Canyon and the same animation studio studio comet this appearance might either confirm that these anime belong to the same universe or that its just seen to be a reference to their other productions.