In Natal charts, the dominant two signs and planets are based on which two planets aspect the most planets in your natal chart and what sign you have the most planets in. My two dominants are 1. Scorpio/Pluto( my Sun is in the 8th House with Mercury, and Chiron, Moon trine Pluto, Sun square Pluto, Jupiter in Scorpio trine Saturn in Pisces trine Mars in Cancer, North Node in Scorpio, Pluto in Scorpio to name a few aspects I have that involve Pluto or Scorpio ) and the second dominant is Mars. This is the basis of my characteristics, I feel Scorpio in ways and it is the major "theme " of my life. Death, rebirth, transformation, psychic things, seeing what's hidden, bringing to light hidden things. This is what a dominant is.
You can find yours by going to astro.com > extended chart selection > Pullen Astrolog > select Simple Chart Delineation by Walter Pullen
Other than what I explained, I feel like everything in your chart shows in some way and they work together to show. One day , your Moon could show , the next your Sun. I would like to think that with Virgo Moon and Cap sun on Cusp that this person maybe very shy/quiet and may have nervous tendencies as well even though they maybe SUPER competent and good at what they do ( Capricorn) Perhaps even very traditional but with the Leo Rising, can sometimes be showy but they may prefer to let their actions speak (also maybe modest) instead of going around saying stuff like" I'M THE BEST, " lol. I would like to think that with the double earth that this person is grounded and level headed and maybe not a lot like Leo in the spontaneous and loud department but still has that fiery energy that maybe magnetic. I think this person may also seem really open to others but then once people get to know them, they may start to see that they actually are very quiet or timid.
There is a singer who has the exact same placements of Sun/Moon/Rising who is now passed away, her name was Aaliyah, you may want to go look at some videos of her on Youtube*you could try typing Aaliyah interviews or something like that*
Sun and Moon combination :
Sun in Capricorn, Moon in Virgo
The combination of your Sun and Moon signs produces a somewhat reserved personality, but one that is well concealed by the pleasant and outstanding image that is shown to the world. You bluff the appearance of being sure of yourself and your purposes. Actually, you have a great deal of difficulty making decisions and your self-assurance is very thin indeed. You progress best in activities in which the rules of the game are well established and decisions play a minimal part in the evaluation of success. You are well-endowed mentally, possessing a logical, systematic, analytical and discriminating mind. Your strong point is in analysis or analytical criticism, as you seek to build up a strictly rational foundation of thought. You control feelings and emotions with an iron grip. In all emotional matters you're careful and controlled. Much of the time you are content to be pretty much a loner. You are not an easy person to talk to or to live with because you are so aloof, reserved, and cautious. Academically you may be outstanding, especially when it comes to facts and realities. Perhaps not so when it comes to theories and hypotheses. A precocious knack for grasping facts may aim the focus of your life toward scholarly pursuits, and your real strength come out when you are allowed to focus your capacity for concentration on a single objective.
http://astrology-numerology.com/sun-moon10.html#Virgo
Sun in Capricorn, Leo Rising combination:
Would Your Lordship deign to pay attention to the vicissitudes of mere mortals? All kidding aside, you can never be satisfied with yourself. Indeed, Leo and Capricorn share the same sense of duty and the same aristocratic vision of the world. They constantly strive to live up to expectations and to never disappoint because otherwise, they would resent it forever. Your Capricorn Ascendant projects the image of a loner which is often considered as misanthropy, rightly or wrongly. Moderation and detachment are the attributes of your Ascendant, and it is only when people get to know you better that they discover your chivalrous and warm traits, because Leo has a big heart and it can but be demonstrative. Although the nature of these two signs is contradictory, they are often blamed for their lack of flexibility and their thirst for power. Indeed, losing control is one of their obsessive fears. Ambition is definitely a quality, a double-edged weapon though...
http://www.astrotheme.com/files/sun_and_ascendant.php