I would like to point out that Christophe is a year older than the South Park boys.
Anne was an unpopular child growing up in Paris France, and when she was a teenager, she met a guy who said he loved her, but he left when she became pregnant. All attempts at abortion failed.
The baby was born a few months later.
Anne and Christophe lived with Anne's mother, Adele, for a few months, because Anne had no job.
A few months later, Anne moved with her child to a smaller town in France.
When Christophe was 8 years old, Adele provided them with money to move to America, as well as for food and other things until Anne got a steady job. They spent a year in Wisconsin before Anne got transferred to South Park, Colorado for her work.
Anne was and is an abusive alcoholic. She had trust and anger issues, and possibly a few serious mental conditions, although nobody knows for sure. She seems to have an intense hatred for her son, screaming at and hitting him, belittling him at every opportunity. She taught him that "there is no love, only words to get what you want". That if anyone ever tells you that they love you, they're liars. Especially him, because he's stupid and ugly and rude and doesn't deserve love. He believed her.
Ever since he was a small boy, Christophe has had ... issues. He would hallucinate; physical, auditory and tactical hallucinations. Most of the hallucinations included some pretty morbid stuff, usually including the death of either himself or Gregory, since Gregory was his only friend at the time. Many hallucinations featured dogs.
He also would have unexplained headaches.
After he died, post-traumatic stress disorder has been added to the list of things wrong with him. Most of the headaches and hallucinations have been chalked up to symptoms and side affects of his ptsd, since he doesn't tell people that he did indeed have some of them beforehand. He also experiences extreme mood swings, and anger control issues, although he's getting better. Self-loathing and depressive symptoms are there as well, and he has actually attempted to end his own life, multiple times.
His body is riddled with scars, mostly battle-wounds from his job, but not all.
Christophe began smoking at a very young age, and would sneak his mother's alcohol out of the house to drink. Both alcohol and tobacco have become addictions for him.
Anne had her son enrolled to Yardale Academy, a private Catholic School. He dropped out at the age of 16, not because he couldn't pass, but because he simply didn't care enough to finish. He hated the school and everything it stood for.
When Christophe was in fourth grade, his first year of Yardale, he was digging a hole in the forest so he could have a place to go when his mom got violent. This is where Gregory found him. Christophe refused to tell his name because 'Christophe is a stupid name', and so Gregory decided he needed a nickname. I bet you can't guess what that was.
They quickly became friends, or as close to friends as Christophe would get to anyone.
They taught each other skills like fighting and digging and language skills. (Christophe taught Gregory French, and Gregory helped teach Christophe better English.)
Over time, they started stealing and such for money, together as a team. They split the money as children often do with babysitting and dog walking money, and spent it on things their parents didn't want them to have, like sweets.
You know what happened to lead to Christophe's death, of course.
Afterwards, Mole was even more stand offish and moody and such, and at some point, the two got in a fight. A big fight. In which many insults were screamed, punches were thrown, and overall, Christophe never got over it.
This could have something to do with the fact that Gregory was the first person Christophe ever actually trusted, his first friend, and honestly, even if neither of them really knew it...Christophe's first real "crush".
Christophe still tries to avoid Gregory, even if he doesn't quite understand why he has such an intense hatred towards him.
Mole continues with the Mercenary line of work without his partner.
Carmen Perenzski is the closest thing he ever had to 'family', and they consider themselves siblings. They were friends when they were very very small, back in France, before Anne moved him to America. They were reunited years later.
Conner and Christophe met through 'La Resistance'. They fought side by side and formed a rather strong friendship that lasted even after Chris left. Christophe finds Conner's Military strictness and love for America rather amusing, to be honest, and Conner will poke fun at Mole's accent and strange ways.
Mole's first girlfriend. He cared about her quite a bit, actually, but it just wasn't .. love. Not in the romantic sense. Of course, since he had never experienced actual true love, he didn't know that. When he did realize, he hesitated telling her, because he didn't want to hurt her. That was a big mistake, because he ended up messing around with other people while they were still together, and that only made it worse when it actually came time to break it off. He still cares about her, even though she hates his guts, and has moved away.
The only person he's ever truly loved romantically.
One of the many girls he fooled about with when he was still with Ryowen [see above]. Neither of them actually remember meeting, but the memory of waking up together in Mica's bed is very vivid in both of their minds. At first, Christophe hardly felt any emotional connection to her; she was just another girl. That changed rather quickly, though, when they started to actually hang out.
It's because of Mica that Christophe decided that he couldn't keep going the way he was with Ryowen.
When Mole realized that he was actually falling in love with Mica, he was determined to .. almost scare her away, because he was convinced that if the feeling became mutual, he would only end up hurting her. And he didn't want to hurt her, he cared about her too much.
Mica has helped him in so many ways; she has talked him down from suicide, taught him to be a bit more open with his emotions, dealt with his now rare hallucinations, helped him quit smoking, etc. The list would take too long to write out. In later years, (in the timeline in which they never broke up) they get married and have a son, Andre. In the canon timeline, they had a very violent fight ending in their break up.
Oh yeah. I almost forgot. Acid.
Acid is the crazy goth looking girl who has an unnatural obsession with Mole. She has gone as far as to physically fight him into handcuffs and ropes, and sexually assault him. Not exactly a thing he wants to talk about.
These assaults resulted in a child, a son. The son was named after his unwilling father, and raised in a situation ironically similar to Chris's own. The boy rejected his given name and took on a different one, 'Monster'. He grew up with an irrational hate for his father(who he had only heard of through his mother), because he 'abandoned' them.
This situation has seriously made Mole re-think everything he thinks he knows about his father and his relationship with Anne.