Not much is known about Natsuko's personality, but she appeared to be a nice girl, judging by her kindness towards Aya.
Natsuko's appearance is never shown.
Not much is known about her, aside from the fact that she is studying in the same cooking class as Aya.
Act 3: The Hopper
After Aya gets scolded by her teacher, Rei Kusunoki, Natsuko and Tezuka come over to cheer Aya up, saying that Rei shouldn't act so stuck up. Then, they discuss the possibility of Rei's flavor ideas being stolen from Tosuke Kigawa, noticing that the taste of her cake is simllar to the missing man's ice cream.