This card is based on Benkei, a warrior monk in Japanese folklore known for dying a standing death while guarding Minamoto no Yoshitsune during their final day.
Along with "Superheavy Samurai Monk Big Benkei", this is the only legal monster to completely break the unwritten "convention of 3000 DEF" — it has over 3000 DEF, may be Normal Summoned without Special conditions, and has no negative effects.
It also technically break the "convention of 3000 ATK" as it can use its DEF during the attack.