She's mimicking the pose of Vul Panther of Taiyou Sentai Sun Vulcan.

I believe she's saying "Youko's you is the you in taiyou", where taiyou is sun and is the first part of the above-mentioned copyright, but I would like a confirmation of that interpretation before adding a translation.

Edit:

Got a confirmation from Laethiel on Discord that the above interpretation is correct, so I added it to the image.