Meet the Elemen Sisters. They aren't exactly biological sisters, but like the elements they are based off of, they are pretty close to one another. Melodiana the Holy and Lucy the Dark couldn't make it to the photo op.
(From Left to Right on couch)
Mizu - The timid water elemental. Out of the bunch she's the most loyal and trustworthy. She mainly cleans the other Elemens messes, usually without a fuss. She does get easily flustered, especially when it comes to lewd things, so she is often playfully picked on by the others for it, especially Ruby.
Ruby - The dominant fire elemental. She loves to pull pranks on the others, and doesn't know what "going too far" means. Like a wildfire, her passions aren't easily subdued, especially lewd ones. If she finds someone she likes, she won't hesitate to show them her "affection," and she doesn't like to take no for an answer. It is very common that you see her pulling pranks on Mizu.
Petra - The strength of the sisters and the earth element. Petra is most likely the most normal out of the bunch, and acts the most mature. Being the oldest, she takes care of the others and makes sure things don't get out of hand. Her personality towards her lover is completely different though, acting more like a yandere than anything. When lusty, she is like a predator and the lover her prey. She loves to mention very erotic things to him, just to see his scared look.
Slyph - The carefree wind element. Laid back, she doesn't do much to help around the house, apart from helping ruby with her pranks aimed at Mizu. She doesn't like to be tied down, even in relationships. If you think you have a shot with her, you better try your best to keep things exciting, or else she will get bored of you and move on.
Yuki (behind couch) - While she isn't an Elemen sister, yuki still spends a decent amount of time with them. A very quiet girl, it is hard to tell what's on her mind. While she is friendly with the Elemens (especially Mizu), she is rather cold (pun-intended) towards people she doesn't know and/or trust. She often helps Mizu around the house, and in return Mizu teaches her about manipulating water.
These characters are from way back, initially made in Artificial Girl 3 (Way back in May 2013!) I grew sort of attached to them (this was the first eroge game I played where you could make your own characters), so while I did stop playing the game, I never uninstalled or removed the game. Eventually, I decided to recreate them in Honey Select! For free commissions, I will be using these characters. Here are their original AG3 looks:

I have installed a decent amount of mods since I created these characters in HS, so I may recreate them now that I have experience. (Especially Petra, she looks entirely different from her original look.)