Sophitia is born on March 12 which makes her a Pisces. The traits of a pisces are:
Shy, Romantic, Trustworthy, Aloof, Dreamy, Creative, Understanding, Unrealistic, Impractical
Personality of Piscies:
'Pisces are generous, amiable, positive natured people with a deep sense of kindness and compassion. Pisces are highly tuned in to everything around them including the feelings of others.
Pisces are not typical people. They are too idealistic and impractical for every day run of the mill living. Pisces are sensitive and instinctual rather than bookish or mechanical. When Pisces find the right situations, they are capable of some incredible deeds. Pisces completely and wholly engage in a chosen path, to the exclusion of everything else. This obsessive compulsive energy can be healthy and not. Pisces can be workaholics (and other kind of -aholics too).'

Who can doubt that Sophitia is understanding and care about others feelings? She is the "Emotional Goddess" after all. I will agree with the romantic and shyness too, judging from her love life and she seems shy when she talks to Hephaestus.
About the idealistic, unrealistic and those stuff, perhaps you can charactize her that, since she started a journey to beat Soul Edge...
Sophitia has with no doubt done an incredible deed when she destroyed one of the two Soul Edge swords and she is following her chosen path (Hephaestus told her to destroy Soul Edge) with determination.

Sources: 1, 2