Right so I was doing some research to see how old you're character is in sun/moon and how old Gladion is. It's generally agreed that your player is 13-14 while Gladion is 14-15, since it's assumed Gladion is an older brother. So, in the story, you are 13 and Gladion is 15 until a time skip. If the time skip is over years, their ages will be reaffirmed.

Also I don't draw the pictures for these a lot because it takes a lot of time. .-.