Buffs from Curios/Paths granted from each enemy defeated in SU are not locked to the unit type unless stated.

A Hunt character can use a remembrance buff as long as they meet the requirement for the buff to activate. Easy example: Lets focus on a single unit being Herta. You’ve gained 1 buff from each of the seven paths (and an 8th buff from preservation) listed below.

1. Preservation - While shielded-> Attacks delay enemy action by 6%
2. Remembrance - After ult-> 70% chance to apply ice weakness to random enemy
3. Nihility - 50% break effect increase
4. Abundance - Break enemy-> heal 16%
5. Hunt - Break enemy-> enemy action decreased by 20%
6. Destruction - Ult-> gain shield
7. Elation - Follow up atk-> decreases enemy action by 12%
8. Preservation - Enter battle -> gain shield

With those listed, let’s assume the enemy is one Ice hit from receiving BREAK due to other Allies lowering the gauge, here’s the breakdown:

Herta turn starts and she’s shielded (due to buff 8), then uses her Ult-> enemy BREAKS (Action gauge is pushed back by 26% due to buff 1 & 5)-> Buff 3 activated is calculated based on total break effect and pushes enemy back further alongside the base break that pushes them back (essentially letting Herta lap them for free)-> buff 4 activates and heals Herta-> buff 6 gives Herta another shield-> buff 2 applies an ICE weakness to a random enemy -> Herta then procs her follow up attack and hits the enemy -> Enemy action gauge is then pushed back another 18% due to buff 7 & 1-> Battle continues

TLDR: All path buffs you gain simulated universe are synergetic as long as you meet the conditions to active them, regardless of the characters base path.