性格だ

to have a ... personality

→ 性格
phrase Uncommon #19,380
to have a ... personality Used after a description of someone’s personality or temperament.
JA: 妹は明るい性格だ。
EN: My younger sister has a cheerful personality.

君は皆に好かれる性格だ

You have a personality that everyone likes.

— マルコムX (1992)

彼は消極的な性格だ。

He has a passive personality.

彼は真面目な性格だ。

He has a serious personality.

ナンシーはとても陽気でかわいらしい性格だ。

Nancy has a very cheerful and sweet personality.

問題なのは、彼女の能力ではなくて性格だ。

The problem isn't her ability; it's her personality.