Constellations:

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C1: Crimson Bouquet

While in a Paramita Papilio state activated by Guide to Afterlife, Hu Tao's Charged Attacks do not consume Stamina.

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C2: Ominous Rainfall

Increases the Blood Blossom DMG by an amount equal to 10% of Hu Tao's Max HP at the time the effect is applied.
Additionally, Spirit Soother will also apply the Blood Blossom effect.

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C3: Lingering Carmine

Increases the Level of Guide to Afterlife by 3.
Maximum upgrade level is 15.

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C4: Garden of Eternal Rest

Upon defeating an enemy affected by a Blood Blossom that Hu Tao applied herself, all nearby allies in the party (excluding Hu Tao herself) will have their CRIT Rate increased by 12% for 15s.

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C5: Floral Incense

Increases the Level of Spirit Soother by 3.
Maximum upgrade level is 15.

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C6: Butterfly's Embrace

Triggers when Hu Tao's HP drops below 25%, or when she suffers a lethal strike:
Hu Tao will not fall as a result of the DMG sustained. Additionally, for the next 10s, her All Elemental and Physical RES is increased by 200%, her CRIT Rate is increased by 100%, and her resistance to interruption is greatly increased.
This effect triggers automatically when Hu Tao has 1 HP left.
Can only occur once every 60s.

Your support is more valuable than a primogem.