Anthropomorphizing the Seven Virtues seems a little tricky. Not the cardinal Virtues so much, but definitely the three Spiritual Virtues of Faith, Hope, and Kindness (Charity, Love).
Faith gives rise to Hope gives rise to Charity. There's no Charity without Hope, and no Hope without Faith.
That's not to say that the idea is only faithful Christians have hope. The idea is that people put their faith in various things, and this gives them hope. When that faith is proven justified, hope grows and acts of selfless kindness become easier. When that faith is proven false, hope dies and acts of kindness become harder.
As an example: When one has Faith that they are going to live forever in paradise, that wellspring of Hope allows them to make the ultimate selfless act of Charity -- laying down their life for someone else.
Separating the three "Spiritual" Virtues into three distinct people seems like dissection to me. You end up with multiple parts, not a living whole.
Even the Holy Trinity is three-persons-as-one in God. The Father gives rise to the Son, the Father and Son give rise to the Spirit. Distinct yet whole.
Besides which, a personality based on Faith would be Hopeful and Charitable. The person couldn't be the incarnation of Faith and avoid being those things as well. This causes overlap and stepping on toes.
...If forced to personify the Spiritual Virtues, I'd make the Triune God in microcosm. A single being with three "jobs." Perhaps three different personalities for each job, but I don't know if that would work. But if three different personalities, perhaps also the ability to split apart into two or more bodies.
Faith would be past-oriented, because Faith remembers the truth and its promises. Hope would be future-oriented, because Hope looks forward to possibilities and the fulfillment of promises. Charity would be present-oriented, concerned with helping people in the here and now, to inspire them to Faith, let them know of the promises, and to work towards making those promises come true.
As I said, separating Faith from the other two is impossible. A person who sat around remembering past truths and promises, but not looking to the future or commiting present acts of kindness, would be worthless. Faith without Acts is pointless and can’t really be called Faith. Likewise, Acts without Faith are directionless and fruitless, so separating Charity from Faith and Hope is cutting it off at the knees.
The Seven Vices may stand alone and quarrel, but the Three Spiritual Virtues are inseparable team players by nature.
As for the four cardinal virtues, I wonder if those aren't just another form of the Four Humors or Temperaments. If not, they're probably somewhat related.
This bears investigation.
Good judgment comes from experience.
Experience comes from bad judgment.
-Unattributed Native American Proverb