The heroine is a mecha weight loss fanatic. She chooses the mecha simply because it consumes the most calories. The happiest thing every day is how many calories are consumed.
Character of the heroine: Self-centered, irritable, her aunt has always been disordered, causing her mood to never be stable, poisonous snake, delicious, sleepy, easy to gain weight, afraid of getting fat, and will do whatever it takes to lose weight.