Here they are gussied up a bit.

Koshini - the hair is part of a Koshini package (I can't remember if it's the base set or a different clothing pack.) There's multiple color MATs available, I just pulled in the default. The halter top was definitely from an expansion pack. I didn't put a texture on her as most of the textures are colorations, not realistic skin tones with freckles, etc.

Koshini's proportions are very different and it takes a lot of fudging to get clothes to work for her. I've heard that you can trick the Tailor into making morphs to get things to fit her, but I haven't tried it out yet. Textures are Koshini only. Vicki hair can be adjusted if you scale it by 153% and move it on the Y axis. (Maybe a bit on the Z axis as well, I don't remember.)

Aiko - Hair is free by Studio Maya. Texture is a commercial package called Tallulah and the clothes (I believe) are by Xena.

Aiko can wear texture packages made for Stephanie, and can use Mike textures with a bit of work. Hair may need slight scaling, but not that much. Clothes are a bit easier to fit, but still need work.

If you need something more specific, give a holler and I'll see what I can do.