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"Maria… I'll make sure to take care of this, sister."
And lastly, there was Arthur, Maria's brother, composed and silent, carrying his spear of yin and yang while his aura constantly shifted between light and darkness. A specter made of many souls and dark and nightmare powers emerged behind him, his guardian and undead familiar, Ignis.
And behind them all, there was the rest of Maria's army, Thorn, the gigantic blood vine monster spread her vines everywhere, rapidly trying to encompass the entire nightmare demon castle, or well, what was left of it, so she could better scan its surroundings and find anything her master, or her allies needed, while also providing support. Root looked at her from afar, he was happy she came along too.
And the rest of the Nightmare Undead were led by Magnus, Beatriz, and Legion, the Nightmare Demons that Maria had "contracted" which were now about to fight against their own kind, to "liberate themselves" or whatever she had told them.