君 after a girl's name

Vocabulary Explanation: Honorifics

The Detective Boys get caught up in a counterfeit money case, taking their new classmate, Ai Haibara, along. After the case is resolved, Conan walks Haibara home, only to discover she’s staying with his neighbor.

灰原(はいばら):: 「ただいまーーー…」; “I'm home...”
阿笠(あがさ):: 「ああ、お帰(かえ)り哀(あい)君(くん)！」; “Oh, welcome back, Ai.”; Literal: “Oh, welcome home, Ai-kun!”

Key Points

1君(くん) can follow a girl’s name

Although 君(くん) is especially common for boys and young men, it is not exclusively masculine. It can also be used for a girl or woman when the relationship and setting make it appropriate.

2お帰(かえ)り answers ただいま

Haibara announces that she is home with ただいま, and Agasa welcomes her back with お帰(かえ)り. This is a common phrase pair used when someone returns after being out.