This spell was found in the researh because of the "Defender" in its name, it has probably nothing to do with the fight where the others spells will appear.
Also, the idea of NGO seems fair. Either it's a vehicle, or it's a non-enemy NPC.
It seems that these data are data for Black Prince quests, but let's suppose it's data for Ra-den.
Who is Ra-den? It's
him. What do we know about him? He is a titanic watcher, keeper of the Engine of Nalak'sha. When Lei Shen encountered him, he somehow managed to steal some of his power and claim the Engine of Nalak'sha for himself. It's very likely that he defeated and captured Ra-den, imprisoning him in the Throne of Thunder.
If we manage to find and free Ra-den after defeating Lei Shen, he may attack us because a long period of captivity can make anyone angry. OR, it can be wounded, weak and need our help to fully recover his power.
I wouldn't be surprise if Ra-den was a nice NPC during this encounter (or, like Tsulong, an ally for a part of the fight, an enemy for another part.)
Edit: Also, "celestial defender" looks like a fair name for someone designed by the titans to defend the Engine of Nalak'sha.
Again, I agree with the fact that these data may only be a part of Black Prince quests. But what if they aren't?