Questions & Answers about kare wa sassato heya o deta.
は marks 彼 as the topic of the sentence.
So 彼は means something like as for him or he in natural English.
It does not exactly mean the same thing as an English subject marker; it sets up what the sentence is about.
In this sentence:
- 彼は = as for him / he
- さっさと = quickly / without hesitation
- 部屋を = the room
- 出た = left / went out
So the structure is roughly:
As for him, he quickly left the room.
Grammatically, 彼 means he. However, in natural Japanese, pronouns like 彼 are often omitted if the person is already clear from context.
So this sentence is perfectly correct, but in real conversation, Japanese speakers might simply say:
さっさと部屋を出た。
if it is already obvious who left.
Also, 彼 can sometimes sound a little more explicit or written than English he. Japanese often prefers leaving subjects unstated when possible.
