Xi Er "Shell"
About
Shell is considered to be a nomad; he often encounters Mao and his friends during their travel. Starting at a young age, he has travelled around China in order to learn more about cooking. He has a very optimistic view on life and often scolds Shirou. He's had a bad impression of Shirou ever since Shirou unknowingly made him a bad plate of food.
Shell is very athletic and also happens to be good at math. He later travels with Mao and the others in search for the Legendary Cooking Utensils. His Hokkien name is Ji Long.
(Source: Wikipedia)