These are my current observations. I'm aware I need to observe more to improve my understanding of the connection between planets and functions. I deduce the main theme I've seen similarly in both then match the planets and functions accordingly. There are 10 planets and 8 functions so there will be some overlaps. I tried my best to match their essence together. I hope you like reading these because I have fun connecting! It's a fun way to learn cognitive functions.
You can be strong in mutiple planets but we focus on your strongest planet(s) or influence hence your type or dominant/auxiliary function(s) is most likely associated with those planet(s). You can be influenced by mutiple planets and the lesser influence (the influence may still be strong no matter what) may be associated with your lower functions (auxiliary, tertiary, inferior).
Easy aspects (trine, sextile, conjunction) work like dominant/auxiliary/tertiary functions and hard aspects (square, opposition, conjunction) work like tertiary/inferior functions.
Focus on aspects, houses, signs, etc. to know your influence is associated with which function(s).
For example: you have strong Mars, Moon and Pluto. Mars is the strongest, Moon second and Pluto last. You may be an ESFP (Mars: Se; Moon: Fi or Fe; Pluto: Ni, Fi & Te). It's just a rough example to predict your type. I don't claim its accuracy since this is just an observation. Overall it's for entertainment purposes so have fun!
I associate Si - introverted sensing with Saturn. It's an easy connection because these two are very similar. They are both about hard work, stability, conservation, tradition, etc. I notice dominant/auxiliary Si and Ni users or J types (ISTJ, ISFJ, INTJ, INFJ, ESTJ, ESFJ, ENTJ, ENFJ) have strong Saturn or Earth influence in the chart. They are blessed by Saturn. I'm jealous because I have inferior Si and a weak Saturn. You may wonder why dom/aux Ni users may have a strong Saturn. It's because our chart is a combination of lots of influences. One placement doesn't purely mean you are a certain type. It just means you have strong Saturn influence, but you may have other stronger influences (for example, Pluto or Mars) that make you another type. Descriptions are overlapping. J types in general prefer to plan so they may have strong Saturn or/and Earth influence. But Si is Saturn closest archetype, not Ni for the above reason. ISTJ is the closest to Saturn due to having auxiliary Te that is more tough, masculine and fatherly. ISFJ with auxiliary Fe is more warm, motherly and Moon-liked.
The most possible type: ISTJ
Other possible types: ISFJ, INTJ, INFJ, ESTJ, ESFJ, ENTJ, ENFJ
Honorable functions: Ni, Te
I associate Ne - extroverted intuition with Uranus, Jupiter second. Ne and Uranus are similar in so many ways. They are both about unorthodoxy, unpredictability, open mindedness, qurikiness, futurism, freedom, etc. Ne is the opposite of Si, like Aquarius comes after Capricorn. Dominant/auxiliary Ne users (ENTP, ENFP, INTP, INFP) usually have strong Uranus. Dominant/auxiliary Se users may also have strong Uranus in a lesser extend or P types (ENTP, ENFP, INTP, INFP, ESTP, ESFP, ISTP, ISFP) in general. P types prefer to go with the flow, are more adaptable and love freedom so they may have strong Uranus or/and Air influence. ENTP is the closest to Ne due to having auxiliary Ti that is more detached, partial and logical and tertiary Fe is more humanistic. ENFP with auxiliary Fi is more passionate and personal.
The most possible type: ENTP
Other possible types: ENFP, INTP, INFP, ESTP, ESFP, ISTP, ISFP
I associate Ne - extroverted intuition with Jupiter because they are both about optimism, fairness, foreignism, theory, philosophy, etc. Dominant/auxiliary Ne and Se users or P types (ENTP, ENFP, INTP, INFP, ESTP, ESFP, ISTP, ISFP) in general may have strong Jupiter because they all love adventures & traveling. I think Ne is a bit more closer to Jupifer than Se because Ne is theoretical and philosophical like Jupiter while Se is hands-on and practical. Among the two dominant Ne users, ENFP may be closer to Jupiter because they can be more optimistic due to not having auxiliary Ti that structures dominant Ne in ENTP. ENFP is also more stubborn, untamed, honest and idealistic due to their auxiliary Fi.
Color: beige? I don't know lol help me pick a color.
The most possible type: ENFP
Other possible types: ENTP, INTP, INFP, ESTP, ESFP, ISTP, ISFP
I associate Se - extroverted sensing with Mars. They are all about drive, action, competitiveness, agressiveness, passion, bravery, pioneer, impulsiveness, athletics, wildness, confidence, sexiniess, etc. Dominant/auxiliary Se users (ESTP, ESFP, ISTP, ISFP) have strong Mars or Fire influence in the chart. Dominant/auxiliary Se users are hot, athletic, blunt and child-like like Mars and Fire placements. They have no filter. Nothing fears or stops them. They can't be controlled. They master following what they want. They're doers. They learn by doing. ESTP is the closest to Mars due to having auxiliary Ti that is less emotional and more tough. Mars is not based on emotions. ESFP with auxiliary Fi gives a touch of softness and is Venus/Neptune-liked.
The most possible type: ESTP
Other possible types: ESFP, ISTP, ISFP
I associate Ni - introverted intuition with Pluto. They are both about psychology, secret, knowing, mind reading, manipulation, depth, etc. Pluto is a higher octave of Mars like Ni is the opposite of Se. Dominant/auxiliary/tertiary Ni users (INTJ, INFJ, ENTJ, ENFJ, ISFP, ISTP) usually have strong Pluto or Fire/Water influence. Ni is about what we don't know or our unconscious. Ni perceives our hidden dark sides. Ni reads into silence and absence. Ni/Se users have encountered many upheavals and gone through transformtions like they have lived many lives so they have a profound understanding of human psychology. INTJ is the closet to Pluto since auxiliary Te is more commanding, intimidating and powerful and tertiary Fi is more passionate, deep and intense. INFJ with auxiliary Fe is more motherly and Moon-liked. Another planet that connects to Ni is Neptune.
The most possible type: INTJ
Other possible types: INFJ, ENTJ, ENFJ, ISTP, ISFP
Honorable functions: Se, Fi, Te
I associate Fi - introverted feeling with Neptune. They are both about idealization, compassion, etc. Dominant/auxiliary Fi users (INFP, ISFP, ENFP, ESFP) usually have strong Neptune or Water influence. Fi alone is a creative function to me. So many talented artists are dominant/auxiliary Fi users because of their ability to express emotions. They understand the intricateness of their own feelings so they have deep sympathy for other creatures. They have high desire to live in the best world so reality is often not their strength. Luckily ISFP have a more balanced auxiliary Se and tertiary Ni so they can conquer both physical and spiritual worlds fine. INFP & ENFP can be too idealistic, scatter-brained, clumsy and unrealistic due to blind spot Se (INFP) and inferior Si (ENFP). I've also seen dominant Ni users (INFJ & INTJ) have strong Pisces/Neptune because of the dominant Ni + auxiliary Fe combination (INFJ) and tertiary Fi (INTJ). The dreaminess, glamorousness, creativity transcendence, etc. are similar to Ne & Ni. INFP is the closest to Neptune due to dominant Fi and auxiliary Ne provide a highly creative combination.
The most possible type: INFP
Other possible types: ISFP, ENFP, ESFP, INFJ, INTJ, ESFJ, ENTJ, ENFJ, ISTP, INTP, ENTP
Honorable functions: Ne, Ni
I associate Te - extroverted thinking with Sun. They are both about leadership, competence, achievement, success, etc. Dominant/auxiliary Te users (ENTJ, ESTJ, INTJ, ISTJ) usually have strong Sun or Fire influence. I've also seen dominant/auxiliary/tertiary Se and dominant/auxiliary Fi users (ENFJ, ESFP, ISFP, ISTP, ENFP) except INFP (due to blind spot Se) and maybe ESTP (due to tertiary Fe is more Moon-liked and ESTP is more pure Mars) have strong Sun/Leo/Fire influence. The drama, expressiveness, passion, authentication, attention seeking, etc. are also associated with Fi in the Fi/Te axis that wants to express their identity. Dominant/auxiliary/tertiary Te, Fi & Se users have a drive to be seen successful. They want to shine and feel like the best of the world. That's the best feeling ever. ENTJ is the closet to Sun due to dominant Te that is assertive, authoritative and commanding and tertiary Se is strong, fast and risk-taking.
The most possible type: ENTJ
Other possible types: ISTJ, INTJ, ESFP, ISFP, ENFJ, ISTP, ENFP
Honorable functions: Fi, Se
I associate Fe - extroverted feeling with Moon. They are both about affection, warmth, care, etc. Dominant/auxiliary Fe users (ESFJ, ENFJ, ISFJ, INFJ) usually have strong Moon or Water influence. Dominant/auxiliary Fi users (ISFP, INFP, ESFP, ENFP) may also have strong Moon or Water influence in a lesser extend. The difference between Fi and Fe is Fi have high ideals (Neptune) while Fe likes to protect loved ones (Moon). They both want to feel loved. INFJ is the closest to Moon because dominant Ni is intuitive and sensitive to all needs and auxiliary Fe is still caring but less smothering and prefer one-on-one interaction. Si (ISFJ, ESFJ) gives a more physical and down-to-earth attention while Moon is more intuitive. Dominant Fe (ESFJ, ENFJ) can be more Sun-liked because they want public attention.
The most possible type: INFJ
Other possible types: ENFJ, ISFJ, INFJ, ISFP, INFP, ESFP, ENFP
I associate Fe - extroverted feeling with Venus. At first I didn't have much knowledge to match Venus with a function. I know Venus must be a feeling and sensing type. Neptune is a higher octave of Venus so it's more intuitive and abstract while Venus is more physical and sensual. Since Neptune is associated with Fi due to out-of-this-world ideals, I found Venus seeks more shallow admiration and material luxury. Taurus can be both either Si or Se with its desire for physical comfort and materials. Libra loves to be in a relationship which is associated with Fe more than Fi. Libra seeks harmony, peace, politeness and balance are all associated with Fe. Hence I believe Venus is more related to Fe. While Neptune and Pluto are more related to Fi due to idealization and passion. Dominant/auxiliary/tertiary Fe & Fi users (ESFJ, ENFJ, ISFJ, INFJ, ESFP, ENFP, ISFP, INFP) usually have strong Venus or Earth/Air influence. No matter what Venus is the lower octave of Neptune so it will influence both Fe and Fi. ESFJ is the closest to Venus since dominant Fe has sophisticated and charming manners and auxiliary Si loves physical comfort.
The most possible type: ESFJ
Other possible types: ENFJ, ISFJ, INFJ, ESFP, ENFP, ISFP, INFP, ESTP, ENTP
I associate Ti - introverted thinking with Mercury. They are both about logic, accuracy, connection, calculation, etc. Dominant/auxiliary Ti users (INTP, ISTP, ENTP, ESTP) usually have strong Mercury or Earth/Air influence. Tertiary Ti users (ISFJ, INFJ), dominant/auxiliary Ne users (INFP, INTP, ENFP, ENTP) and dominant/auxiliary Te users (INTJ, ENTJ, ISTJ, ESTJ) may also have strong Mercury or Earth/Air influence since Ne is about making connections and Te is also rational in making decisions. INTP is the closest to Ti since dominant Ti is logical and auxiliary Ne is more theoretical.
Other possible types: ISTP, ENTP, ESTP, INFJ, ISFJ, INFP, ENFP, INTJ, ENTJ, ISTJ, ESTJ
The most possible type: INTP
Honorable functions: Ne, Te