Krittika
Krittika is the 3rd of the 27 nakshatras of Indian astrology. Degrees: 26°40′ Aries–10°00′ Taurus. Ruling planet: the Sun. Deity: Agni, god of fire. Symbol: a blade, a flame.
Personality
Sharpness and directness. Krittika cuts: its people see to the core, speak the truth, and can't stand falseness. Its fiery nature gives determination and the ability to clear a situation of everything superfluous.
Weakness: sharpness that turns into harshness, and a tendency to criticize where support was expected.
Ruling Planet and Deity
The ruling planet, the Sun, determines through which period of life the nakshatra's theme unfolds: in the dasha system, it is the ruler of the Moon's nakshatra at birth that determines which period a person's life begins with.
The nakshatra’s deity is Agni, god of fire. In the tradition, this deity reveals the nakshatra’s meaning more deeply than a description of character does: it is invoked in rituals connected with this part of the sky.
Each nakshatra is divided into four "padas" of 3°20′, and in Jyotish the pada refines the description. Determining the pada precisely requires the time and place of birth.
Suitable Occupations
Tradition associates the Krittika nakshatra with the following fields: the military, surgery, cooking, metalworking, criticism and expert assessment.
This is not career advice but a description of traditional correspondences. Your nakshatra is determined by the Moon's position, so you need your date, time, and place of birth.
Compatibility
In Kundali Milan, the Indian comparison of charts before marriage, the Moon's nakshatra determines most of the 36 compatibility points: Tara, Yoni, Gana and Nadi are calculated from it, while Varna, Vashya, Graha Maitri and Bhakoot come from the Moon sign.
Separately, the tradition takes "Nadi Dosha" into account: if both partners' nakshatras share the same nadi, the marriage is considered unfavorable. This is one of the most controversial parts of the system, and it is the reason perfectly good matches fall apart in India.