Rahu is the Moon's North node and is a head which has no body only head is present, that keeps overwhelming things without being satisfied ever. Into our lives, Rahu brings fear stressful situations that are only due to the adventurous nature of Rahu which loves Surprises. Rahu also loves taboo-breaking and also breaks or crosses all types of boundaries. Events that may not be the real part of our lives that are only illusions rather illusions it becomes reality. It breaks traditions and wants to be unique. One seeks God only after achieving material wealth, and because of this Rahu responsible for spiritual breakthroughs. Rahu has a desire for worldly stratagem and material things. Rahu also wants to seek the highest possible success positions in each zodiac sign and house.
Sun represents our father and the father figures. Sun is the symbol of authority, power, status, ego, dignity, father, king, brilliance, Royal status, political career, administration, bureaucracy etc.
If the Sun is exalted in Aries, then it will be able to better handle himself than in the other Zodiac signs. It will better handle it in Leo too, which is its own sign of Leo with Rahu. Hence, we can say that Sun controls the bad situations or circumstances which will create by Rahu. Rahu deceives cheater and sun is the father, so sun lower the chances of Rahu which create disbalance in one's life because a person has a much better relationship with their father.
The persons who have sun Rahu conjunction in their zodiac signs or horoscope will talk very high and overconfident and give expressions, a drama which shows lack of confidence and fear.