Ming leans back in his chair and scratches his head a bit.
"r-Rep help for an r-Rep problem would be the correct answer. The thing is, Yu is, or was, on a secret research project. Most of her colleagues here think she's on a sabbatical so I refrained from requesting help from higher profile sources. For all I know, she just missed her check in... She might be completely fine, just delayed." 
He pours himself a glass of water "I wish I could tell you more, but I haven't had the time to look more into it. I only know she egocast here and that's the last trace I have of her."