Let’s look at important things here –
Mars - Mars represents our will power, courage, ability to take actions, aggressive nature, anger, our fighting ability, brother, male friends, a boy friend for a girl, a soldier, an athlete and real estate etc.
Purva Bhadrapada Nakshatra - It is a nakshatra related with mystical events and experiences. It is also nakshatra of duality. Please check this link for more info on Purva Bhadrapada Nakshatra - https://www.astrosaxena.com/pbnaksha.
Aquarius - As Purva Bhadrapada is part of Aquarius sign, Aquarius and things represented by Aquarius are also important here. Aquarius is 11th sign of zodiac belt, hence it signifies the things and energy related with 11th house of horoscope, such as Gains, Desires, Hopes and Wishes, Large Organisations, Network Circles etc. Besides this, Aquarius also represents Scientific Thinking & Research, Uplifting the Society, Higher Goals & Rewards for all. Aquarius is made of another set of 2 and half Nakshatra, i.e. Dhanishtha, Satabhisha and Purva-Bhadrapada. Aquarius Lord is Saturn & Rahu.
Pisces - As Purva Bhadrapada is also a part of Pisces sign, Pisces and things represented by Pisces are also important here. As Pisces is the 12th sign of zodiac belt, it represents the same energy and things which are represented by 12th house such as Isolated Places, Spirituality, Imagination, Other Dimension or Other World etc. Besides these things, it also represents your Hidden Talents, Ability to work in background, Spiritual Self etc. Pisces is consisted of last 2 and half nakshatra, i.e. Purva-Bhadrapada, Uttara-Bhadrapada & Revati. Pisces' lord is Jupiter.
Saturn & Rahu - As Saturn-Rahu co-rule Aquarius, their position and dignity is important to know about the overall functioning of any planet in Purva Bhadrapada/Aquarius.
Jupiter - As Jupiter rules Purva Bhadrapada and Pisces, its position and dignity is important to know about the overall functioning of any planet in Purva Bhadrapada/Pisces.
Houses Involved – Also, we can’t afford to forget the houses involved as a planet can be ruling different houses and sitting in different house for every person as per ascendant and planet’s position. To know overall affect, we have to consider the houses involved as those areas of life are being impacted.
Interpretation of Mars in Purva Bhadrapada Nakshatra – Now, Mars energy and actions are coming into the domain of Jupiter ruled nakshatra Purva Bhadrapada. Any energy exchange between Mars and Jupiter makes person inclined towards putting his actions in religious or spiritual pursuits. As Purva Bhadrapada Nakshatra is closely connected with spirituality, these people can be actively involved in meditation, yoga and other spiritual pursuits which require good amount of physical activities. In Aquarius section, they can be inclined towards being an entrepreneur through such pursuits whereas in Pisces section, they can be more inclined towards helping themselves and others spiritually. They can also be seen as spiritual guides or mentors to others. The only drawback with Mars-Jupiter energy exchange is that person can develop fundamentalist approach in matters of religion or knowledge where he feels that his beliefs are better than others. So, they need to be careful against any such tendency. In Pisces section, they can be more spiritually driven as both nakshatra and sign lord is Jupiter. Yoga Teachers or Martial Art experts are commonly seen through this position. Overall, a great position for spiritual pursuits but fundamentalism is the only thing they need to be cautious of.
Role of Saturn & Rahu - Also, Saturn-Rahu placement is important to guide Mars in right direction, being Aquarius lords.
Role of Jupiter - Likewise, Jupiter placement is important to guide Mars in right direction, being Pisces and Purva-Bhadra lord.
Other Factors – And of course, we need to consider conjunction, aspects, house lordship, house position and dashas etc to know the exact results of Mars in Purva Bhadrapada. So, we always need to take a holistic view of chart rather than just 1 planetary position.
Conclusion – So, this is how I see Mars in Purva Bhadrapada can work in a chart.