You seem complex because of the Scorpio rising. This ascendant is the way others see you, not necessarily the way you are once people get to know you better. You seem very serious and only speak to new people if you really have something important or interesting to say. I have Scorpio rising too, and people tell me I seem too serious, and like I don't want to be bothered at times. I really am deciding if the person is worth getting to know better, trying to size them up. That's what you are doing too! But it's not a bad thing, you are strong-willed, independent, able to read people well, as well as kind and sympathetic to those you care about.
The Gemini Sun takes you to a more light-hearted and fun place. You can be chatty, and actually a good communicator. It's normal to see contradictions in astrology charts. Gemini is an intellectual sign, so you like to keep up with all topics, and know a little bit about everything. You are a flirt! But this helps balance out some of that Scorpio seriousness, allowing you to let your guard down.
The Leo Moon is about your emotions, so when you do flirt, you usually already know you are pretty much interested in the person. Leo Moons are a bit high maintenance in relationships, you need a lot of attention and expect to be on a pedestal. But you are warm and generous. Leo and Scorpio are fixed signs, it's hard to get you to change your views. The Gemini Sun helps there, it forces you to be fair and look at issues from both sides.
I don't think it's really a complex trinity. Of course, that's all it is, this is not an interpretation of a complete astrology chart.