The first of these is Yildiz vel Enas, a little girl who was turned into a vampire and who tries to get by in the world. For a system I think that 3.5 or pathfinder would be the most suitable, with some way to mitigate the massive level adjustment of the vampire template. And the only creatures she would summon would be cats of course. She isn’t a bad person, although good would also be overstating it. She could fit into a variety of games. On her own she would try to survive, and that same desire to survive could also bring her into a group.
The second is Hannah Moritz or Nightshade. She is a telepath in the modern world. I’m not entirely sure about a system to portray her in, but I think that some sort of superhero thing would be the best fit. She would probably be a bit of a villain, she isn’t entirely sane.
Serdynage Hastur-Vartul is a merchant princess who was born blind. She incidentally also is a vampire with the little flaw of being incapable of noticing sunlight until it starts to burn her. She usually is surrounded by a few select servants, each of whom she has personally selected. They do jobs like reading her letters and caring for her. In a game I think that she could be made using 3.5/pf rules, with some way to get a few servants, such as leadership. In a game she would be someone moving behind the scenes, increasing her wealth and her connections. She isn’t someone who has done a lot of fighting of course.
Nahrissah is a yuan-ti pureblood who broke with her kind. Below I have some things that I had written for her, but nothing of it is set in stone. The basic idea is that she is a roguish person who specialized in the use of poisons. She is basically looking for a place in life.
Rengare once was a knight, but her death changed her. She now is a death knight, bound to her armour. She enjoys her martial skill and wants to prove that she is a truly great warrior. In a campaign she could do a variety of things, including even the time-honoured dungeoncrawling.
Khurshid is is a former village girl who was taken as a servant by a great red dragon. She is utterly loyal because she has convinced herself that this dragon, Tirasa, is almost a divinity. She goes out into the world to do this dragon’s work.
And another, for who I found the background on an old computer. She is Drimanai, a priestess of a good goddess who had done a little research, but of course, she read too much and now she has fallen in love with a long-vanquished lich. Of course, she believes that she can actually bring the monster back and that they will be eternaly happy together. She will start out as a very naive young priestess, but she might change during her quest, and of course, she might not be entirely happy with what she finds at the end of it.