Hello Colien, welcome to this Forum. I hope you will enjoy your time with us and have a chance to learn more about astrology.
You mentioned that your cousin has a retrograde Mercury, but I dont see that in his chart. The first link you gave, the chart expired, but I got the 2nd link. Ascendant 15° Cancer. Mercury, planet of communication in the 12th.
The orbs astro dienst gives are very large, so that Mars-Mercury conjunction, i.m.o. is way too large and on top of that outgoing. Mercury moves faster than Mars.
He has a totally exact conjunction from Jupiter with Saturn (expansion/limitation) in square with his Mercury, coming from the 4th house of early childhood, upbringing and family (traditions).
A Mercury, and stronger here because it also rules his 3rd house, in the 12th often shows that the child, when still very very young, up till 1 year, was often left on his own, without people talking to him, you know, babytalk, showing that they are there for him, and by looking and talking to the baby, giving him the impulse to "talk" back. There was most probably very little interaction. This could be one of the reasons, together with that square to that conjunction in the 4th house, which makes it difficult for him to express himself in such a way that others understand what he means.
The 12th house is very much a private house as you might know. Now if you look at the Ascendant, Cancer, also known for their shyness, and the ruler Mars, again in that 12th house. The Ascendant shows how he expresses himself to the outside world. Oh yes, in Aries, he can be very outgoing and in the 10th house, he will be able to show that in public, but that Mars ruler pulls him back. After a session out in the open, he badly needs his privacy to get his act together again or to sort out his thoughts. He will always need periods of being totally by himself.
Saturn rules the others, the 7th house and the square from both Mercury and the ruler of the Ascendant Mars to this Saturn show fully the problems he has with other people. He is indeed very afraid of getting hurt emotionally.
The fact that he can be social is more of an act for him. It really costs him a lot of energy (Mars square Moon) to behave in a social way.
Moon, Venus and Pluto are all significators of the Mother or women, especially the Moon of course.
Venus squares Uranus:This is the traditional divorce aspect. He keeps people at a distance, wants to be left alone, does not allow intimacy.
Often this aspect shows an absent mother, either really not there (like having left the child or died) or just too busy doing things and never "be there" for the child.
Venus rules the 4th, usually a sign of peace and harmony and his upbringing has strongly influenced his value system (ruler 4 in th e 2nd.) and the Sun, houseruler 2nd in the 1st. The Sun is in an anaretic (critical) degree.
I get mixed messages here, on the one hand a nice Venus, showing how he values his family and on the other hand these T-squares involving his 4th house Jupiter/Saturn conjunction in square to his 10th house ruler and opposing his Ascendant ruler in the 10th. He could have had serious problems with being disciplined and most probably was not an easy child.
What allerts me is the Jupiter/Saturn exact conjunction in square to his Mercury, 3rd house ruler, showing severe up and down moods, which could even be a sign of mental imbalance like bi-polar disease. Note that also his Jupiter rules his 6th house of illnesses.
My own brother is bi-polar. Extremely bright, also used to be very sociable until he had to go into a boardingschool. When he was 21 he became seriously ill and it turned out that he was manic-depressive. He can still be very sociable, loves people,but more than anything else lives in his own world, mostly by himself.
You wrote:
because he is very pessimitic at times
but probably mean depressed.
Moon opposes Saturn: very careful in showing his feelings, very easily hurt and often a sign of being able to become depressed when transited by Saturn.
Moon square Mars: anger towards women, emotional suppressed anger in general (Mars in 12)
Pluto square Sun: great need of attention, sometimes power struggles with one of the parents or a deep emotional upheaval which left his scars.
He does see the relationship of his parents as very harmonious (Moon trine Sun and Venus sextile Mars) and this also shows that his actions and his emotions are in harmony with each other. He does, what he feels is right for him. Sun sextile Saturn makes him a responsable person (Saturn is exalted in Libra, actually at 21 ° where his Pluto resides and Sun is in term of Saturn).
When he was 17 years old, Jupiter and Saturn, by Solar Arc, conjuncted Pluto, sextiling Neptune.Pluto rules his 5th house of romance and selfexpression.
Solar Arc Venus also sextiled his Ascendant. It could be that he had a romantic encounter at that time, maybe even his first one.
But it could also be that at that time something profoundly changed healthwise. (Jupiter conj.Pluto)
Solar Arc Uranus exactly conjuncted his 6th house of work and illness.
The fact that he has become more and more solitary could be an indication of mental trouble, but of course, I am not a medical astrologer and am just telling you what I see here and what I have seen in other charts related to similar problems. I would keep an eye on him or, if you can, try to figure out what is bothering him. it could also just be a temporary time of confusion for him with Saturn transiting his mental house at the moment, sextiling his Ascendant and natal Mercury. Even though it is a sextile, Saturn still manages to put a domper on your way of being.
Transiting Pluto is also ingoing the exact inconjunct with his Sun. This aspect is a traditional illness aspect and as Pluto transits his 6th house, I would be watching this one.
Neptune is opposing his Venus from the 8th house. Issues related to his family might be very confusing momentarily as well as issues related to love and how to express it.
Transiting Uranus now at 19° Pisces in his 9th house, is trining his Ascendant. An urge for more freedom and also a change in his ideologies and philosophies of life could be the result.
Mercury will soon go direct again and hopefully he will feel less inclined to be alone. Jupiter will enter his 7th house and hopefully that will also bring him into contact with others a bit more and Sun will soon enter his own house, the 5th.
I hope I have given you a better insight into his character. He has anger issues which are deeply burried and which he should learn to face. Mars is the Apex of his T-square. Saturn stops him from taking action which is deeply frustrating for him. Question is, who was Saturn in that 4th house, his father or his mother? He probably does not know it himself but something has happened to him when he was very small which really angered him. Maybe he does know and should try to get this out of his system in order to stay healthy. After all, that Mars also squares Jupiter (high fevers).
Cheers, Starlink