Keep
The current trait clearly improves the unit's repeated role.
Stop rerolling and test the gain across several normal runs.
Reroll Planner
Match traits to unit roles, use clear reroll stop rules, and protect limited resources instead of chasing a perfect label with no route payoff.
Media Reference
Combat and menu references keep the reroll decision tied to a real unit and a repeatable route, rather than an isolated rarity label.
A trait is valuable when it improves the job a unit already performs. Start with the unit role, test the route before and after a reroll, and define a stop rule before spending. This guide intentionally avoids publishing exact odds or multipliers that have not been independently verified.
The current trait clearly improves the unit's repeated role.
Stop rerolling and test the gain across several normal runs.
The trait does not fit the unit or fails to change the route.
Set a strict resource cap, then reroll only while the cap remains intact.
The unit itself may be replaced soon or the route is not stable enough to compare.
Save rerolls until the roster and world route produce a reliable baseline.
Trait fit comes before rarity. A carry wants a trait that improves its real output or consistency; a farming unit wants repeat-loop value; a support unit wants a trait that strengthens the utility the team actually uses.
If a trait looks impressive but does not change the unit's assigned job, it is a weak reason to spend more rerolls.
Decide the acceptable result and maximum spend before opening the reroll screen. Without a stop rule, every near-miss becomes a reason to spend again and the account can lose more value than the final trait provides.
A good-enough trait on a proven unit is often stronger than an ideal trait pursued with all available resources.
Use the same route, team, and session conditions before and after the change. One unusually fast clear is not enough; the trait should improve repeated performance or make a previously unstable route reliable.
Write down the route problem first. If you cannot name the problem, you will not know whether the reroll solved it.
Claim current codes and review upcoming update needs before spending. Free rewards may expand the safe reroll budget, but they should not be treated as permission to empty every resource on one uncertain unit.
When the account still has a world, team, or basic roster problem, fix that foundation before paying for trait perfection.
There is no single best answer without a unit role. The strongest trait is the one that improves the job the unit performs on your current route.
Only if a verified route problem remains and the expected improvement is worth the resource cap you set in advance.
No. Exact reroll odds and hidden multipliers are not published here unless they can be checked against a reliable source.
After codes are claimed and one stable carry and route exist. Early rerolls are risky when the unit may be replaced quickly.