[Rather than the very start of the day, it's at the end of it that Tear makes her way to the training hall. Sentience had been correct; exhaustion had inexplicably hung on her for hours until she just forced herself out, simply too sick of resting anymore and certain she'll feel better once she gets moving.
But she has no intentions of going to that party to do so-- there have been more than enough here to last her for a lifetime already-- and instead heads to train like the practical thing she is. It's rare for her to be in the hall at this time of day, so she's unsure if anyone frequents, and so definitely isn't expecting the blur of movement as she slides the door open.
Despite lingering fatigue her knife is firmly in hand in a heartbeat, lowered only after the motion suddenly halts and a recognizable girl becomes fully visible]