彼の顔は

As for his face, …, His face (expression)

→ 彼
phrase Rare #22,215
As for his face, … 彼の顔 means “his face”; は marks it as the topic of the sentence. 顔 can refer to a person’s face or facial appearance.
JA: 彼の顔はぽっちゃりしている。
EN: His face is chubby.

私は彼の顔は知っているが、実際に話をした事はない。

I recognize his face, but I’ve never actually spoken to him.

彼の顔は覚えているんだが、名前を思い出せない。

I remember his face, but I can't remember his name.

誰も彼の顔は知らない

No one knows what he looks like.

— ファイト・クラブ (1999)

彼の顔は怒りで赤くなった。

His face turned red with anger.

彼の顔は真っ青になった。

His face turned pale.

私は彼の顔は知っているが名前は知らない。

I know his face, but I don’t know his name.

心配で彼の顔はしわが現れてきた。

His face has started to wrinkle from worry.

彼の顔は多くの人に知られている。

His face is familiar to many people.

彼の顔は青くなった。

His face turned pale.

phrase Rare #38,487
His face (expression) Used when describing how his facial expression or appearance changes, often to show an emotion.
JA: 彼の顔は喜びで明るくなった。
EN: His face lit up with joy.

彼の顔は怒りに燃えていた。

His face was burning with anger.

その知らせを聞いて彼の顔は青くなった。

His face turned pale when he heard the news.

彼の顔は喜びに輝いていた。

His face was radiant with joy.

彼の顔は喜びで明るくなった。

His face lit up with joy.