Pumpkin Heads are a skeleton-type enemy found in Halloween 2015 Event quests. They can be Saber, Archer, or Lancer-class.
A stronger version, Pumpkin Leader (パンプキンりーダー), appears in higher-leveled quests. It has the same attacks, but does more damage and has more HP.
Pumpkin Heads of all classes have a normal melee attack and the skill Strange Dance. (奇妙な踊り), which causes Defense Down. They can act only once per round.
It takes 4 ticks to fill up a Pumpkin Head's Noble Phantasm.