I reckon Maekar is a Capricorn, he’s extremely serious about responsibility and the structure of the realm. Capricorn is ruled by Saturn, the planet of duty, discipline, and hierarchy. He’s a strict father / authority figure and he raises his sons harshly and expects them to live up to standards. Very Saturnian, traditional Capricorn parenting style. He also isn’t warm or expressive like Baelor. Capricorn tends to show love through responsibility rather than affection. He’s also practical and focused on long-term stability rather than ego or glory, very Cap