Ying Yue didn't attack. She was feeling something odd from this Spiritual Creature and because of that, she refused to perform any action other than Dodging and running away.
She had even sheathed her daggers and simply used her shadow step whenever she had no way to escape. She could hide like an assassin should and wait for an opportunity but that won't do.
She needed information about this Spiritual Creature and the best way to get it was by fighting it. It would use everything in its arsenal as long as she persisted and she would know everything.
'Why did that girl fight so... weirdly? It also felt like her mind wasn't completely alright. But that should be impossible considering everyone was in their prime condition before coming here. And that only leaves with one option...'