MY Kira is invisible

Sounds like you are missing some files. Since you reinstalled, I am assuming that you are using the new streaming launcher (BitRaider), you can check this by opening the launcher and seeing if there's a small ST in the bottom left corner.

To repair your files when using BitRaider, do the following:

1. Close the game and the launcher
2. Go to your SWTOR folder and delete the BitRaider folder
3. Now start the launcher and login. It will check which files are missing and repair them; this may take a while but once it is done, you should be able to see Kira.

Let us know if this didn't work so we can try further steps.

gonna try this right away thank you for your answere 🙂 

Definitely let us know if she's still missing after the repair.

Sometimes, the companion portrait is missing, you then have to hit N to open the companion window and call her manually.

Also, keep in mind that during some chapters of the Fallen Empire story, you are not allowed to have a companion so she will be unavailable there.

So I have done as you said, after deleting the folder nothing happen, I see the name of my Kira but not herself. I alsp notice that some PNJ and bots are invisible too 

It's possible that if you have very low graphic settings, some PNJ are not rendered.

Go to Preferences, Graphics, and set the Display limitation for characters for high, then they shouldn't be invisible. By the way, even though Kira shows invisible, she'll still help you throughout the fight.

does not work too my graphic at almost at the highest perf. Well the probleme is that it's not only kira , it also Pnj mobs and even other player when I played a PVP