Nallab and his dinosaur partner Enit managed the Waterfall City library. Nallab escorted Arthur Denison around the city on his first visit, introducing Arthur to many Dinotopian wonders such as the helicoid geochronograph and Arctium longevus. Arthur was surprised to learn that Nallab was 127 years old at the time of their meeting. Nallab also appeared to be a member of the Waterfall City Council.