If the North Node is Aries, the South Node is necessarily Libra, the Nodes are each end of an axis.
Aries - Libra
Taurus - Scorpio
Gemini - Sagittarius
Cancer - Capricorn
Leo - Aquarius
Virgo - Pisces
The general text can be studied for both ends, so an Aries North Node person will identify with both Aries and Libra qualities to some extent. What matters is the context in which these qualities become dominant.
Context of the Nodes
We can use the idea of the soul's journey through life as if it comes into incarnation already blessed with skills and attitudes associated with the South Node. This is what is found easy, and upon which we come to depend and perhaps habituate towards when dealing with major life issues. The North Node is challenging; this is where our best work is done in soul evolution, but only if we take on the challenges of relearning so that we undo the habituation of South Node methods and struggle to balance them with North Node spiritual aspirations.
In youth we tend to celebrate and depend upon South Node qualities, and it is rare to find a person under 40 years old whose North Node is showing clearly. As the years pass, interest in South Node activities dwindles and North Node realisations shape the personality much more. An older person will always have the profound resources of the South Node available and yet will additionally have the North Node's hard-won skills and wisdoms to call on.