When a vocab is a single kanji all alone, it usually has the same meaning as its kanji parent. That goes for this vocab word as well. Person is person.
When a vocab is a single kanji with no okurigana (hiragana attached to the kanji), it usually uses the kun'yomi reading. Since you don't know the kun'yomi reading for this kanji yet, let's use a mnemonic to learn it.
What does a person hate more than anything? They hate extreme heat (ひと). You can always put on more clothes to stay warm, but when the heat gets too high, you can only take off so much.
This person is Koichi.
Is that person a cleaning person?
There were many people on Mt. Fuji.