Rompb'ua

The Rompb'ua were an extinct species, known to have been as ancient as the Forerunner, and to have developed in a satellite galaxy of the Milky Way. They once inhabited the Milky Way, but abandoned it prior to the activation of the Halo installations, and their current whereabouts, if they haven't gone extinct is unknown. They are recognizable by their astounding height, as well as varying coloration (which was actually a genetic trait).

If has been noted that the Rompb'ua had left many huge structures on the worlds whom they have once inhabited, however, abandoned space-habitats of their's appear more frequently. At first, some of their works were assumed to be of Forerunner origin, but this wasn't isn't so, as architectural evidence suggested otherwise.