To be fair, we've had plenty of primals summoned in strange ways. Shinryu uses Nidhogg's Eyes as an aether reserve instead of aether crystals. Moggle Mog, Shiva, Thordan and Bahamut are all based on historical figures that actually existed instead of myths. Susano and Tuskiyomi are summoned with mystical objects associated with a kami of the same name. Titania could be strange just in how she is summoned and how she maintains herself in the maeterial realm.