Why Are All the DIsciples I’ve Taken in Troubled Girls?

Xu Jinghuai, peak master of Youyun Peak in Wuling Immortal Sect, the foremost immortal sect in Cangnan Realm, and a revered Venerable in the current age, took only three disciples in his lifetime, yet each one turned out to be a troubled girl.
His eldest disciple, Xia Jin, an elegant and graceful immortal maiden with a peerless immortal physique!
Unfortunately, she’s a pervert…
His second disciple, Luo Qing’er, a mischievous little dragon girl, the cherished daughter of the current Demon Emperor!
Unfortunately, she’s a tsundere…
His third disciple, Mu Cheng, a cold, emotionless, white-haired older sister, the number one sword dao genius in ten thousand years!
Unfortunately, she’s…

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“Hmm… next, it’s time to go back, but before that, I’ll make a detour to Immortal Eater Town.”
“Mm-hmm!”
Luo Qing’er nodded repeatedly, letting out a small sigh of relief when she saw Xu Jinghuai’s attention shift elsewhere and that he hadn’t noticed her unusual behavior.
But then, she immediately felt a hint of regret.
Thinking about it carefully, the words she couldn’t say earlier didn’t actually have much ambiguity.
On the contrary, perhaps if she had spoken them, the distance between her and her master might have grown even closer…