Magic Relations
The magical diagraph to get a general idea on how stuff relates to one another in my story (mostly Ancients and Champions but generally in all my stories):
And which Ancient is connected to which soultrait.
Determination/Survival = Fate Perseverance = Nim Patience = Past and Future Integrity = Death Kindness = Life Justice = Judge Bravery = Knight
The circle also shows which magical traits are easiest to use for each person with certain traits.
Example (obverse the coloured dots in each coloured area for reference): Someone with a kindness soul main ability and magic will come from the kindness area. But, each soul trait has overlap with the other soultraits, meaning each soul can in theory do stuff from other soul traits. The amount however differce a person. Someone with a kindness soul can be born in the area which only has the magic of the kindness soul (the area with the green dot (life)) will be able to do all the magic with a green dot but not any of the area's without a green dot but, the soul can also have been born in the area of the green and yellow area (green and yellow dots) which means that soul will be able to do both that area, and the purely yellow and purely green area.
As you can imagine, This can become a lot for a soul to handle and the soul will start to pick and choice what it can do.
Example: Papyrus has been born in the little grey area right near the middle but still in the Bravery zone. Meaning he has a large field of things he can do and only a very little zone of things he can't do. But because he has the ability to use as many of the zones as he has this is hardly noticeable.
Example: Error is on the other side of this spectrum. He only has integrity but thanks to his own skill and stubborness he has managed to copy every other zone wiht the use of little overlap his own magic field has and a lot of stubborn energy.
As you can see, depending on where in the 'zone' each soul is born it depends on which skills the soul has available. The soul itself may have the Justice trait but the magical abilitys would be equally bravery as it is justice.
And that is a very short explanation on soultrait and magic connections and how it all influences stuff and why two people of the same soultrait may have completely different abilities.