In Jesus' parable, the kingdom of heaven is like what kind of man seeking fine pearls?

Answer: A merchant

The kingdom of heaven is like a merchant in search of fine pearls who, finding one very precious pearl, sold all he had and bought it.

“Again, the kingdom of heaven is like a merchant in search of fine pearls. When he found one very precious pearl, he went away and sold all he had and bought it.”— Matthew 13:45-46 (BSB)