This is where her acting chops shine. The disgust on her face isn't real disgust; it is performance disgust. She is playing a woman who is playing hard to get. The meta-layer is thick.
In the first ten minutes of OAE-214, Saika speaks exactly four lines. The rest is silence. But it is a loud silence. oae 214 - kawakita saika
Do not watch OAE-214 for the "action." Watch it for the 20-minute slow burn at the beginning. Watch it for the way she lights a cigarette. Watch it for the way she doesn't flinch when he raises his voice. This is where her acting chops shine