The people of God on earth have 2 natures: an old sinful nature and a new holy eternal nature. When Jesus returns, He will obliterate the temporary sinful nature in the believer, and only the new eternal nature will remain forever.
Unbelievers have only 1 nature: a sinful nature. Jesus has only 1 nature as well: a holy eternal nature.
Eph 4:22-23, Eph 2:10