Rohini is the birth nakshatra of Lord Krishna. Lord Vishnu incarnated as Lord Krishna on earth to fight against the evil forces. It is also believed that the 9 planets including Rahu & Ketu are avatars of Lord Vishnu and moon is associated with the Krishna Avatar. Rohini falls under the taurus zodiac sign and it is where the moon is exalted too.
Annually the birth of Lord Krishna is celebrated onthe Ashtami(8th) tithi(lunar day) when the sun is in leo and moon in rohini nakshatra.

The primary motivation for planets in Rohini is Moksha(Spiritual realization) and often times rohini people find enlightenment through devotion.

The deity associated with this nakshatra is Lord Brahma – The creator. Brahma is the universal father or creator of the entire universe and thus rohini symbolizes creativity and fertility.