The Entity and The Jedi Entity are two different things entirely. While the latter was actually confirmed in-game to be the jedi exile, true identity of the former is still unknown. It was only speculated, based on lore entry, that the entity is in fact Kreia/Darth Traya from KotOR2. Drew Karpyshyn kinda hinted at that (in an interview that I did with him via email), supporting the said thesis though the matter is still rather uncertain to say the least.
Oh then I'm not sure what the Entity even is... Is she shown, or just a voice? Refresh my memory, especially since I've not done Taral V or Malestrom (hell, any flashpoints other than Black Talon or Esseles with new F2Pers.... recently finally did Lost Island for the first time and was amazed the group wasn't yelling at me for not spacebarring it) without people screaming "**** PRESS THE *********** SPACEBAR" at me in over a year.