Don’t forget how they said he could easily power up....and then Uta went on his revenge training for 30 more chapters...
According to someone who posted on the last chapter, it seems Fried has the ability to copy/absorb (?) the ability of people he has sex with. So he basically r*ped all the mother of uta's demon sisters
Ight, we can stop calling Fried a "hero" now, clearly he isn't that, not even closethe only way i see for the ""hero"" to have the same power as the girls here, is that he stole -somehow- the powers that their mothers had. still, it is yet to be explained why the hell the ""hero"" hates the sage mark that much...