Using photoshop, all you really need to do is bring the two characters together using a magic wand too, shade off some bits of Yuna's front head section (Yuna, because of the way her head is facing) and erase the grit that would usually occur when two pictures merge. It's a simple process of move and blending and IMO Moomba Mistress you did very well at that. I'm a little concerned about where Yuna's body disappeared to but pfft! details details!

I know. I did a kiss edit for Zidane and Garnet.