いたずらっ子こ

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た

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Meanings

1

mischievous child; scamp; rascal

Refers to a child who is playfully naughty, often in an endearing way. Used for both boys and girls.

Our little rascal drew on the wall again.

彼かれは小ちいさい頃ころ、近きん所じょで有ゆう名めいないたずらっ子こだった。

When he was little, he was a well-known mischievous child in the neighborhood.

2

Used in fantasy or folklore contexts to refer to a small mischievous supernatural being. Less common than sense 1.

いたずら
いたずら is the noun/adjective meaning 'mischief' or 'prank', while いたずらっ子 specifically refers to a mischievous child or imp.
やんちゃ
やんちゃ also means 'naughty' or 'mischievous', but is more often used as an adjective describing behavior, whereas いたずらっ子 is a noun for the child itself.

いたずらっ子こUsage100%
Standard mixed kanji-kana spelling; widely used and easily readable.
悪戯いたずらっ子こ
Full kanji spelling; less common but still encountered.
悪戯子いたずらっこ
Compact kanji spelling; rare and may be confusing.

Compound of いたずら (mischief) + 子 (child). The reading いたずらっこ includes a geminated consonant (促音) for euphony.