ワルク ワルクェイド 暴走アルクェイド
Fan nickname for the demented version of Arcueid Brunestud.
Comes from waru- (bad) + Arcueid, in the same line as Wario, Waluigi, etc...
Also known as Red Arcueid or Bousou Arcueid.
This tag implicates arcueid_brunestud (learn more).