In Universe, All of planets are completed so The Little Prince gives the star to Grate for Grate's first time until The Little Prince hugs Grate & leaves him all alone. Now then, Grate is first time for his first mission of planet until he saw the dark smoke of planet (The Little Prince n his family's planet) approach so he flys on it & opens the door up then he went inside. Until Grate is shocked that he saw a person must be The Little Prince's Dad (Nice & Calm)

The Little Prince's Dad : Ah, you must be my son's friend? I'm The Little Prince's Dad