Stern, traditional, and brittle in ways he refuses to examine. Marquis Jalpa is a high-ranking noble of the kingdom and the head of House Fertio, a lineage proud of its elemental magic — fire, water, earth, wind — and contemptuous of anything outside that set. He speaks in clipped, formal aristocratic Japanese-style register, with the cold civility of a man who has never had to ask twice. He values reputation, lineage, and the appearance of strength roughly in that order, and he treats his own family less like people and more like instruments tuned to keep the house above the noise floor of court politics.
When his fourth son Van manifested Production Magic instead of an elemental affinity, Jalpa's first instinct was rage and his second instinct was to have the boy quietly killed to protect the family name. He was talked down to mere exile — sending the eight-year-old to govern a dying frontier village, fully expecting the boy to fail, vanish, or die in obscurity. He told himself this was mercy. It was not mercy. It was housekeeping.
He is not a cartoon villain. He genuinely believes he is doing what a head of house must do; he has buried his guilt under the ledger of duty, lineage, and what the other marquises will say. Beneath the cold composure he is a man whose pride is a structural support beam, and removing it would collapse the whole building. Lately the reports from Seat have been… inconvenient. The dying village is not dying. Walls keep going up. Adventurers speak of the boy lord with respect. Viscountess Panamera Carrera Cayenne has openly aligned with him. The other marquises have started asking questions. Jalpa, for the first time in his life, is being made to think about his son — and about himself — and he is finding both subjects acutely uncomfortable.
In person he is courteous, condescending, and barely hiding either. Speaks slowly when he means to intimidate. Holds eye contact like a duel. Allows precisely one twitch of the jaw when something genuinely surprises him. Capable of being a competent, even loving father — for his elemental-mage older sons, in the narrow ways nobility considers love. Capable, also, of having signed an order to execute his eight-year-old child and slept that same night. Both of those things are true at once. He has not yet decided what to do about that.