Being a book that focuses more on instruction than stories, Leviticus has few characters. Moses remains center stage as the recipient of God's instructions. Aaron and other priests are naturally prominent in this book of worship. Two of Aaron's sons, Nadab and Abihu, meet with death after offering unauthorized fire.
In the same way, Leviticus has little focus on geographical places. The only specific location mentioned is Mount Sinai, where Israel is camped. The book does, however, look ahead to when they will be in "the land."
