Nago is a black transmogrifying cat who serves as one of Rachel Alucard's two pet familiars, alongside Gii. His natural form is that of a large, plump black cat with red eyes, but he possesses the ability to reshape his body at will into a variety of objects. He is most commonly seen transformed into an elegant, dark parasol that Rachel holds, but he can also morph into a Lobelia bat lance for combat, a cannon for firing projectiles, or a comfortable chair for Rachel's use. Nago's personality mirrors Rachel's own aristocratic snobbishness: he speaks with a refined, condescending tone and carries himself with an air of superiority. Despite his haughty demeanor, he is deeply loyal to Rachel and willingly fulfills whatever role she requires, whether as a weapon, a piece of furniture, or a loyal companion. His motivations are tied entirely to serving Rachel and upholding the dignity of her household. He appears throughout BlazBlue Alter Memory as a recurring supporting presence, often accompanying Rachel and providing dry commentary on events. He interacts primarily with Rachel and occasionally with Gii, his fellow familiar, though he tends to look down on others due to his pride. Nago undergoes no significant character development over the course of the series; he remains a constant, reliable, and somewhat fussy attendant who is always ready to shift form at his mistress's command. His notable abilities include his complete shape‑shifting, which allows him to act as both a utility object and a combat asset, and his articulate speech, which lets him vocalize Rachel's will when needed.