あれっ

huh?

interjection Rare #38,006
huh? An expression of surprise or confusion, often used when noticing something unexpected.
JA: あれっ、鍵がない。
EN: Huh? My key is missing.

あれっあれっ

Huh? Huh?

— 紅の豚 (1992)

あれっ誰だろう

Huh, I wonder who that is?

— ハウルの動く城 (2004)

あれっ巻いた

(Nagi) Oh, did you curl your hair?

— 天気の子 (2019)

あれっ何だ?

Huh? What is it?

— ハウルの動く城 (2004)