Fortune Telling Collection - Horoscope - Do both "Nuna" and "Oh Ni" in Korean mean elder sister? What is the difference?

Do both "Nuna" and "Oh Ni" in Korean mean elder sister? What is the difference?

It all means "sister"

But "angry"? This is the name my brother gave my sister.

"Oh, Ni"? My sister named my sister.

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I hope it helps you.

Could it be the Korean drama "You Are Crazy for Me" you said?