It Makes Sense for Erha to Beat up the Dragon King, Right?

Zi: "Dad, where is my pet beast?" Father: "Here it is." Zi: "??? My pet beast is Erha?" Father: "Yes." Zi: "Then can it defeat the Dragon King?" Father: "???" Erha: "Woof! Woof!" Father: "You are thinking of eating shit, of course you can't." Zi: "Isn't it unreasonable for Erha to beat up the Dragon King? It's very reasonable." Father: It's so reasonable! Erha: I have the appearance of an emperor! ! !