She miraculously came to life after Mr. Dunits accidentally fed the furnace a nugget of Nuberac. Bombina Ponds Legend tells: the wife of a steelworker in a fit of rage created a potion to melt all his fine steel (which was used to build Luka), but the potion enchanted the steel instead.

Come On Board the Petupia Express!
To Mr. Dunits, this locomotive is simply known as Luka.