Even though it's said by other heroes he should rank up, he refuses as he feels it is his duty to remain in the number one spot of A-Class to prevent the unworthy from becoming S-Class heroes, except for those whom he sees worthy like Genos, fitting Sweet Mask's philosophy about "heroes needs to be beautiful too"

But how does he plan to stop? Had he not approved of Genos, what power does he have to stop him from climbing to class S. Isn't that the decicsion for the association?