I recently rewatched "2001: A Space Odyssey", and then I realized something:
Just like the Monolith makes the monkeys use tools (the bone), Celestia makes the ponies of Equestria use Friendship and Harmony.
So Celestia and the Monolith are a bit similar XD
Have the moment, when the "Prime Six" see the celestial Monolith, shortly before they start saying "Hummonee! Hummonee!" all the time!
And as for what their names are: Twiga, Appga, Dashga, Raga, Pinga, Fluttga and Angelsaur.