According to the E3 footage (the 100mb one), the Red-Hair Girl is named Mira. You also forgot the NPC that is wearing the Sith armor shown in the trailers.
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From what read from couple of previews, T3 will be the only returning NPC that would be playable. There will be previous NPC making cameos. I read that HK, Carth, and Revan are confirmed and couple more will also appear as well.