Your companions give you multiple bonuses, making them very useful in Anime Simulator. But to make them even more powerful, you need to assign them traits. Once you know all the traits in Anime Simulator, you can choose which ones you want to keep.

Traits are an important part of Anime Simulator, but they are not easy to obtain. To unlock traits, you must first train to improve your rank. If you want to improve quickly, redeem Anime Simulator codes.

You need to reach Reaper rank with your character to unlock the trait option. To unlock Reaper rank, you need 25k gold, 10 million power, 10 million defense, and 10 million energy. To assign traits, you need to roll for them. Talk to the Traits Manager NPC at the entrance of the hospital to assign traits and re-roll in Anime Simulator.

The Hospital is located behind the Playtime map at the starting location. Traits Manager will tell you that you need to reach Reaper rank to be able to reroll pet traits (he calls your companions pets for some reason). To reroll traits, you need to obtain Reroll Tokens via Anime Simulator codes or by completing quests.