It's time, Saya is calling for her friends, the people Tear knows are important to the other girl-- not Hei, but of course he has to already be right there with her-- and she's been included amongst them.
The revelation and sickening dread of the moment is certainly responsible for her sudden inability to breathe properly, but the small, yet surprisingly strong feeling of honor has a hand in it too. Another pause is spared for Euphie before she decides a few moments will be fine, the princess will be watched by another]
...Saya, I'm-- I'll be there. [It's only a tiny voice she's able to find eventually. Easy to think she's keeping quiet out of consideration for Saya's condition, but really, she can't manage more at this time]