Constellations:

.

C1: A Comrade's Duty

When a character protected by Thoma's own Blazing Barrier (Thoma excluded) is attacked, Thoma's own Blazing Blessing CD is decreased by 3s, while his own Crimson Ooyoroi's CD is decreased by 3s.
This effect can be triggered once every 20s.

.

C2: A Subordinate's Skills

Crimson Ooyoroi's duration is increased by 3s.

.

C3: Fortified Resolve

Increases the Level of Blazing Blessing by 3.
Maximum upgrade level is 15.

.

C4: Long-Term Planning

After using Crimson Ooyoroi, 15 Energy will be restored to Thoma.

.

C5: Raging Wildfire

Increases the Level of Crimson Ooyoroi by 3.
Maximum upgrade level is 15.

.

C6: Burning Heart

When a Blazing Barrier is obtained or refreshed, the DMG dealt by all party members' Normal, Charged, and Plunging Attacks is increased by 15% for 6s.

Your support is more valuable than a primogem.