Holy shit, just checked out what Hannes gua Britannia was from. It's the side material Code Geass: Fragments of the Mosaic, and jesus fuck the guy is a freak canonically.
spark note of it:
The guy is pushed by his mother to reach for the throne, but he's not that impressive so she and the maids often beat him. 15 years of beatings leads him to develop a fear of women, and when he pushes away a girl she falls and gets hurt*. He then has a revelation that crippled women can't hurt him, so he chops the girl's limbs off. Which he finds beautiful or something. As time goes on he proceeds to do the same to his 10 wives (that is, chop all their limbs off).
He was gonna do it to another girl, but a geass user killed him before that could happen.
*I'm pretty sure the girl is implied to tried to have sex with him when he didn't want to or something
Yes, Hannes is actually a character from a fringe piece of CG canon. He's not an OC, at least in spirit.
Pretty obviously, he won't be going down that road unless shit gets really bad. Even if he's not the PC, so don't feel obligated to pick him, but his mother is kind of putting pressure on him to succeed against long odds.
As Blonddude42 posits, there isn't really a 'dump stat' in this quest so much as 'if I can't do it, I should find people for it.'
All six stats are necessary in some way for your PC to, at the very least, be
playable. Dumping a stat runs the serious risk of being blindsided by a problem you aren't equipped for. In the case of weak stats in a given area, your choices will be to gain Traits which use your strengths to cover those weaknesses, build your weak stats up to not be much of a penalty, or hire someone (hopefully loyal) to cover any problem areas for you.
That said, I encourage players to to play to their PC's strengths. At least initially, the choice of PC will dictate what you're good at and where you can excel.
Examples:
Lelouch will be best used gathering information and developing tools/technology/strategies to see victory. He'll be a good character for small delicate (black) operations or building a tech empire.
Euphemia has the potential to be Schneizel 2.0 in a lot of ways, if played correctly. High diplomacy can be extremely useful if you want to move the pieces into place to win without fighting at all.
Carine would be best setting up an army group in a problem area and turning it into a pacified gold mine. That said, she'd likely do it on a mountain of corpses, so playing her isn't for faint of heart.
Hannes should stay out of the spotlight for a while. Ideally, he should go heavy into finance and have everyone financially obligated to him before they can do anything about it to win.
...again, though, you've got time. There isn't a ticking clock in this quest. Unless something goes
drastically wrong, Charles has another 20 years on him before health concerns start settling in. On the other hand, while becoming Emperor/Empress is the
ideal outcome for eventual plans, it's not absolutely necessary depending on how the quest goes. Lots of possibilities to advance your interests as the PC.