Cheko-chan despite her young age,is a major glutton,and a bit smarter than youd think.
Her father was a sumo wrestler and a native hawaiian,her mother was half french,the rest of her heritage is a mix of japanese and other sorts of pacific islander,her tanned skintone comes from her father's side,as well as her genetic tendency towards weight gain.
She very much enjoys being fat and actively wants to become fatter,both from the pleasure of being heavy,round and soft,and to be more like her father,it would be easy to speculate that she will be a major feedee as she grows older,and wider.
Shes very much a typical little girl,sweet as can be and very affectionate,she has developed a crush on arakasa mostly due to proximity,the relationship has become complicated as he has taken a sort of big brother/substitute-daddy/boyfriend role to her,she also crushes on other older handsome boys and men and is usually naive to any romantic advances by people around her age.
She often looks up to people who are massively obese as she also wants to be gigantic