Early screenshots showed that when you captured an enemy and "tortured" them, they appear strapped to a medieval torture device known as a wooden horse. This device was almost exclusively used against women, and forced the victim to sit on a pointed wooden structure with their entire body weight, putting their full weight onto their vulva. This was later changed into a cat. This was likely done to lower the CERO (the Japanese version of the ESRB) rating of the game.

When casting high level spells, characters from anime and manga will appear.

Omega Heal - Index from "A Certain Magical Index"
Omega Wind - Holo from "Spice and Wolf"
Omega Star - Yamato, Jinteidan, Ushiwaka, and Super Zeus from "Bikkuriman"
Omega Fire - Meito from "Anime Tenchou"
Omega Ice - Princess Astrarotte from "Lotte no Omocha"

If the player talks to Laharl, the protagonist from Disgaea 1, in the Camp-Pain HQ, he reveals that his scarf is actually a part of his body. This contradicts Disgaea Infinite in which a conversation with Gordon can have Laharl remove his scarf.