〜のに noni
〜のに（noni）means “even though; although (unexpected/regret)”. のに links two clauses where the second goes against what you'd expect from the first. Formation: V（普通形）＋のに／Aい＋のに／Aな＋なのに／N＋なのに（例：静かなのに／学生なのに）
even though; although (unexpected/regret)
N4Formation
V（普通形）＋のに／Aい＋のに／Aな＋なのに／N＋なのに（例：静かなのに／学生なのに）
Explanation
のに links two clauses where the second goes against what you'd expect from the first. It carries a nuance of surprise, dissatisfaction, or regret, stronger and more emotional than けど/が.
Examples
Note
The second clause cannot be a request, command, invitation, or intention with のに. Note the な before のに for な-adjectives and nouns (静かなのに, 学生なのに).
FAQ
〜のに — what does it mean and how is it used?
even though; although (unexpected/regret). のに links two clauses where the second goes against what you'd expect from the first. It carries a nuance of surprise, dissatisfaction, or regret, stronger and more emotional than けど/が.
〜のに — how do you form it?
V（普通形）＋のに／Aい＋のに／Aな＋なのに／N＋なのに（例：静かなのに／学生なのに）
〜のに — any usage notes?
The second clause cannot be a request, command, invitation, or intention with のに. Note the な before のに for な-adjectives and nouns (静かなのに, 学生なのに).