When Hibiki is done communing with her teacup, she sets it down and exhales, a hundred invisible pounds of burden falling from her shoulders. Looking Sarai directly in the eyes, she pauses for effect -

And smiles, her palpable relief at odds with her haughty words. “Well. It’ll hold its own without sugar.”

A lone sparkle, out of nowhere, twinkles to shoujo life just off to the side of Hibiki’s head. She doesn’t acknowledge it. She’s too busy drinking more tea.

It is possible that Sarai passed.