Translation of "Shyness" in Japanese

Off hand, I'd say her problem is shyness.

一言で言うなら、彼女の問題は内気なことだ。

Her shyness makes me like her even more.

彼女の内気なところがまた一層僕に彼女を好きにさせるんだ。

I like her all the better for her shyness.

彼女は内気なので、ますます彼女が好きだ。

His shyness made public speaking a torment to him.

彼は内気で、人前で話す事は苦痛だった。

I like him all the better for his shyness.

彼は恥ずかしがりやだから、かえって好きです。