Sumire is obviously impressive, being the top maiko currently, by the looks of it, but I believe Kiyo is much more impressive than Kenta. Kenta is just a student baseball player. Although he needs to work hard and put in a great amount of effort, he's still simply following instructions given by others. He doesn't basically need to think for himself as such. Kiyo, however, is fully responsible for providing the house full of maiko their daily food, staying on budget, procuring the ingredients, fullfilling the nutritional needs, yet keeping the dishes so delicious and inspiring it won't affect the maikos' performance, all the while keeping things so realistic she actually can do it without a burnout. Kiyo is basically doing a full adult professional's work all on her own. In some ways she's more impressive than Sumire as well.