Jupiter, considered as the most beneficial planet in Vedic Astrology, always brings luck and prosperity wherever it goes. However, when placed in the 1st House for Leo ascendant or Lagna, this placement is known as Jupiter in enemy sign and can have some adverse effects on the Leo native's life. The first house represents one's personality, physical appearance, and self-esteem. Therefore, Jupiter's position can have a strong influence on the Leo native's personality traits and overall well-being.