Because they're a hero! Better than just a good person- they know the right thing to do and they always take action and make decisions that are best for our world, not just themselves. They're the most selfless and caring person!

[ Mizuki has, at this point, stopped eating himself. He seems far too engrossed in gushing about this person. ]

... I don't know how they know they're right. To be honest, I don't understand their decisions a lot of the time. But I know that they deeply care about people, so they're always right.