Building Booper

Now the heroes who raided our hideout are as good as dead! Building Booper (ビルブッパ, Birubuppa) was a Demon-level mysterious being and a member of the Monster Association.

Appearance
Building Booper is a lean detonator with arms, legs, a long electric cable as a tail, and a predatory face with one eye. The bottom of his detonator body is striped in black.

Personality
Building Booper appears to be a quite sadistic monster. He destroyed the scene around him to corner his enemies so that they are more vulnerable and easier to be killed by the Monster Association while he enjoyed it.

Monster Association Arc
Building Booper is seen in Z-City blocking the heroes' escape and supply routes on the surface by making several buildings around the routes collapse with explosives. He presumably dies when the combined strength of Saitama, Waganma, Child Emperor and Underdog Man push the manhole below the two collapsed buildings, where he is standing in, sending the buildings flying in the air, thus also sending Building Booper flying and eventually falling to the ground which seems to result in his death.

Abilities and Powers
As a Demon-level Mysterious Being, Building Booper was likely a fairly powerful monster. He had the ability to cause buildings to collapse by blowing them up with explosives.

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