普通形态/岁主形态 (强化状态/岁主强化状态)

开领域可用/修补背环可用/神环隐藏

协同攻击

Normal Form / Sentinel Form (Enhanced State / Enhanced Sentinel State)

Available when Domain is active / Available for repairing the Back Ring / Hidden Divine Ring

Coordinated Attack

Note: 

"Back Ring" (背环) can be understood as a ring type forte positioned behind the character.

"Hidden Divine Ring" (神环) refers to a hidden divine halo or divine power ring. So, does Hsin have a specific mechanic or a ring type forte behind her back? It sounds like a resource-consumption mechanic that Hsin needs to restore.

A theory on her rotation based on Sleep's sketches: Since Hsin's sketches feature many enhanced Basic and Heavy Attacks, I suspect this is either a resource-consumption mechanic or a number of time for her enhanced attacks. 

The most plausible scenario on my speculation would be : 

Build up Back Ring charges via teammates triggering Electro Flare or Heart Tune + Intro. 

↓ Hsin enters the field with sufficient Back Ring charges — the Hidden Divine Ring appears? 

↓ Hsin uses Heavy Attack + Core Heavy Attack or Skills 1 & 2, consuming Back Ring charges. 

↓ The Hidden Divine Ring disappears when Back Ring charges are depleted. 

↓ Activate Domain to enter Sentinel Fox form and fully restore Back Ring charges. 

↓ Continue consuming Back Ring charges to use Enhanced Basic Attacks 1–4, Enhanced Heavy Attack, and finally the Finishing Heavy Attack. 

↓ Return to human form to conclude the rotation; with Back Ring charges depleted, begin building them up again in the next rotation via teammates.

Another small info about Hsin via Sleep and Speculate of her rotation