Trait Shards are a reported reroll resource
Current public code trackers repeatedly list Trait Shards as rewards and connect them with trait rerolls. Exact costs, odds, effects, and trait names are not confirmed here.
If you receive Trait Shards, keep them until the in-game trait interface shows the cost and the effect you are about to replace. Do not spend based on a generic Roblox trait table or data from a similarly named anime game. This site does not yet have enough exact-game evidence to tell you that one named trait is always best.