Affinity, Cautious, Puissant: Hex
Eadric has fully embraced and devoted much of Apprenticeship to the study of the darker magics of the Damhadh-Duidsan tradition. He has absolutely excelled here, though arguably at the expense of more Hermetic prowess.
Major Magical Focus, Potent Sorcery: Human Health
These are intended to cover the same general areas as "Magical Foci" for both Hermetic Magic and Hedge Magic respectively. I see this focus as covering both the positive and negative aspects of Human Health as a concept.
Human Health for these purposes I'd define as the general health, well being, and general fitness of human beings.
Human Health I see as covering (direct) healing/wounding/killing, wound and disease recovery rolls, curing or causing disease, causing or mitigating aging (artificial aging, undoing artificial aging, longevity rituals), and direct improvement or impairment of attributes.
In theory this could also be applied to "Mental Healing" or "Mental Damage" of the sort described in Tales of Mythic Europe (pg 118), though I'd grant that is about as far I could see stretching the focus into Mentem (and that, I will grant, is stretching a bit).
I don't think it would cover any sort of transformation, divination/intellego (maybe if it related to getting information about health explicitly), or control/manipulation/movement of the human body or mind. Nor the creation of human body materials or bodies themselves, bones etc. Nor in mentem the creation of memories or feelings or their destruction.
I would contrast this with a somewhat comparable Major Focus of Healing. Healing could affect any sort of Target with a suitably beneficial effect, whether of the Form of Corpus, Mentem, Animal, or Herbam. In theory any Form. Human Health is more specifically applicable only to Human Targets, but includes a more broad (positive and negative) manipulation of the health and well being of Humans in general.
The magical focus on Human Health I see as applying to any suitable Hermetic Magic but not to Hex, and the Potent Sorcery to any suitable Hex or potentially any additional Supernatural Ability that Eadric might learn.
Eadric's pater is named Eldgrimr and is a Damhad-Duidsan Archmagus who is a member of Circulus Ruber in Hibernia. They are of the direct magical lineage of Damhadh-Duidas and his Eldgrimr exemplifies that darker and more aggressive mystical bent, being a truly terrifying master of both Hex and other sorts of similar magics designed Hermetically.
Eldgrimr was/is a harsh master who used unpleasant magic/curses as a teaching tool directly on Eadric, yet was taught in much the same way himself and none the less appears to care deeply for his filus. Yet he always has high expectations and little patience for failure. Eadric knows for a fact that Eldgrimr has a permanent Kolossoi (or equivalent) of him that he has retained in a secure place.
Eadric likewise has complex feelings about his pater mixing admiration, loyalty, even devotion ... with fear, anger, and resentment. Much as Eldgrimr seems to feel about his own pater who has long ago passed into Twilight.
Blatant Gift, Hatred: Mundane Society, Infamous
Eadric was born with the Blatant Gift to the family of a shipwright in Wexford. His Blatant Gift greatly disturbed and troubled his parents and relatives, being active from the moment of his birth. His father died while he was an infant, drowning near the docks of the city due to having fallen into heavy drinking over the whole affair. Soon after the age of six he was abandoned on the streets and grew up there, among other street/feral children, until being found and taken as an Apprentice by Eldgrimr at approximately ten years of age. These experiences have greatly shaped his perceptions of the mundane world (they are all dangerous barbarians who burn wizards and abandon children), and correspondingly he approaches the mundane world as if it is a constant threat that needs deterred and controlled with force. In his case that tends to mean Hexes at least, and not infrequently more.
While not afraid to dissemble (thus not bearing the actual Pagan flaw) and conceal himself Eadric's training by Eldgrimr was steeped in a mixed syncretic blend of Gaelic and Norse divinities. He knows that the Divine Realm exists yet resents it more than anything else, and certainly doesn't have the faith to personally try to draw any sort of spiritual strength from it. He is pagan but practical, as it were.
Eadric seems to have inherited Eldgrimr's temper and penchant for holding long grudges against those whom he feels have earned his revenge. He doesn't often lose his temper publicly, he dislikes losing control though it has happened more than once, yet he takes offence easily and will frequently enact what others might perceive as disproportionate retribution/revenge.
Hermetic Patron: Hibernian Faction/Ordo Hiberniae
As a son of Circulus Ruber and Archmagus Eldgrimr Eadric has great things expected of him in these days of brewing Hermetic conflict. His pater is seen as a key supporter of the Hibernians and Eadric has publicly voiced his support as well. Being taken then as one of the cause and one of a more bellicose sort of magic as to actually engage in the conflict like the forebears of his lineage, the Hibernian faction broadly has adopted the image of him as one at the forefront of the cause. This sometimes manifests itself as direct support yet also can frequently come as an appeal for aid and involvement in the conflict somewhere in Hibernia or beyond.