Naomi was a scientist, who stuided Lapras and their behavior. When the heroes came, she encountered the Lapras, from which one was Ash's. When Team Rocket stole the Lapras, she used a submarine, in which they tracked Team Rocket. Once the trouble was over, Naomi gave Ash an egg, which he needed to give to Prof. Elm.
Lanturn is Naomi's Pokémon, who helps her in studying Water Pokémon.