弟おとうとは見みた目めより真面目まじめだよ。

otouto wa mitame yori majime da yo.

My little brother is more serious than he looks. casual

新あたらしく入はいった社員しゃいんはとても真面目まじめです。

atarashiku haitta shain wa totemo majime desu.

The employee who just joined is very diligent. neutral