Jeralt is somewhat major and minor in the game. He is the father of Byleth and he used to be a soldier for the Church of Seiros.
Byleth and him soon work for the church, he resuming more of his knightly duties, and Byleth becoming a professor for the academy.
For most of the game, he isn’t around for many important things.
But he does show up for a mission when the game start gets interesting for Byleth and her house. In my route in the game, I was with the Black Eagles.
I tried to not get him to fight, as I wanted the EXP for my team, but he was a decent warrior.
But when we think he’s safe… he soon talks with the beautiful but creepy redhead Monica.
Who turns out to be a demon working for other dark beings. They slay Jeralt for reasons…
And he dies in Byleth’s arms before getting a chance to tell her that her mom was a clone of Rhea. Oops.