Cover it with your palm. If your face is covered with meat, holding your chin with both hands is a very small way!
Long-distance shooting, when taking pictures, stay away from the characters, which will make you look much thinner.
Cover with props. Similarly, you can use an oversized marshmallow, a string of red Sugar-Coated Berry, a lovely bear, a beautiful flower and so on. These are great props!
Sitting with your legs crossed, standing sideways, etc., make your figure look fake and full of goddess.