Sun is a powerful and significant planet in Vedic astrology, and its placement in the first house has a lot of significance. When Sun is placed in the first house for Scorpio ascendant natives, it brings about some unique astrological predictions.
Scorpio ascendants are known to be intense, passionate and often mysterious individuals. As the lord of the tenth house (career) and first house (self), Sun has a major impact on these areas of life. Being in a friend sign state, that impact is generally very positive.
One significant prediction associated with Sun being in the first house is a tendency towards leadership qualities. The individual may have an innate ability to inspire and guide others effectively, making them suitable for managerial or leadership positions. This placement also confers an assertive personality that exudes confidence in everything they do.
As far as career predictions go, with the tenth house being ruled by Sun, this placement can bring considerable success in professional endeavors. Whether it's starting their own business or climbing up the corporate ladder, Scorpio ascendants with this placement can achieve enviable levels of rank and prestige.
Sun being in friend sign state means it will take care of its karaka houses - which are 1st and 10th. This placement makes sure that the native remains proud and dignified even when facing tough times. They work hard to shore up their reputation and maintain high standards while going about achieving their goals.
Since Sun also aspects (to some extent controls) the seventh house from this place (7th House represents relationships & partnerships), there is an extra magnetism and charm in interpersonal relationships when Sun is here- leading to great success therein as well,
Nevertheless, since sun brings heat & light - if it changes its course during transits - then relationships with partners could hit rough patches especially related to communications.
Also worth mentioning his pride could lead to limiting beliefs as individual could focus only on expressing one's real, authentic self expression while disregarding others feelings or insights - it's something to be wary of.
To summarize, for Scorpio ascendants with Sun in the first house brings some formidable strength of character and the ability to exude great confidence. This placement ensures they have a charismatic aura necessary for success in interpersonal relationships as well as their professional lives. With their leadership qualities and influence on the 10th house (career) combined with guidance from friend sign state, these natives can achieve amazing success if they remain cautious about pride and beliefs limitation.