It's based on your previous affinity choices in the other chapters as well and the key is to not use any evenly like don't use Barret in the whisper fight except to basic attack just use Tifa's skills and her until Aerith shows up then use Aerith and this combat affinity is affected by the other chapters combat so basically use Aerith alot and Tifa second most when Aerith isn't really around and the points will make Aerith first with Tifa second.

>>1 >>1 Another time I played I chose better things for Tifa (ex: like when we have to choose between going to either Tifa or Aerith in the sewers before the Abzu fight- which I think makes a big difference in affinity)- and this made her come up first in the final boss fight. Playing the game multiple times, I realised things aren’t as random as some think it is. You can try it yourself and see if it works, though. Just to make sure. For me, I love repeating this game XD

>>1 >>1 I’m pretty sure it’s all about the affinity system in the game. Like, what to choose for the dialogue options for both Tifa and Aerith. I played it more than once and saw that it did actually make a difference to which order the characters come in during the Sephiroth fight. I said better things to Aerith the first time, so she came in first.

How the hell did I not get Aerith, the points are super biased towards getting Aerith yet somehow she was last, even though I use all 3 members pretty evenly (Cloud more than the rest).

she is way better and usefull than tifa.. she is the bst healer in the game stupid

Man I wondered why Barret came in, I had my best healing stuff on Aerith and couldn't change it to him. I was like, am I remembering this wrong, guess not - had no idea it was random/point based,.

So I've been trying this boss fight for freaking hours, finally got back to sephiroth after I accidentally selected "from first battle" in my frustration. Give perfect load out for Tifa this time.....discover there is some nonsense point system, and now I get freaking Aerith....WHO THE HELL NEEDS AERITH!?

So its mostly based on who you play the most.