I legitimately don't think Mogusa could look thinner even if she tried... a bit odd, considering her gimmick but she is still cute as ever, so I'm here for her
Keep in mind that a lot of this competitive eating stuff is the result of Gal Sone who at the height of her popularity was still quite thin. She did put on weight later, but she was famous for eating absurd amounts of food and not gaining weight (realistically, she was probably throwing it all up after the cameras were off)