4: He might be a dragon. 5: Crunchy number. 6: 3's girlfriend. 7: He is the villain of number lore, and is a cannibal. 8: The Insectosaurus from Monster vs Aliens. 9: She might be get eaten by 7. 10 She is cute. 0: Similar to O, but he has two eyes.
All Sprites by @BackpackAiden