Name a more powerful fictional character in Japanese gaming history.
If we assume all summoned servants count as part of her powers, there's still a relatively hard limit because Fate keeps a relatively low cap on its powerlevels, all things considered.In canon we use basically every possible resource including specifically ALL summoned servants to fight ORT with multiple layers of conceptual hax involved (the daughter of King Enma taught by Grand Assassin Hassan applying the concept of death to a being that cannot have the concept of death while fighting him in the underworld) and even then we just barely beat ORT (and in fact, wouldn't have done so without Kukulcan, who is herself a part of ORT) helping us because without Kukulcan, ORT could have perpetually resummoned himself.And the ORT we fought wasn't even as powerful as the ORT we know also exists in Proper Human History. Considering ORT is itself just a basic planet cracker tier entity, there's absolutely stronger entities out there in fiction and therefore stronger than Ritsuka + all summoned servants