Aaaand I posted!

Also, I don't see anything wrong with a Genin knowing an assassination technique. 
Though the character is listed as a A-B rank ninja. That isn't B rank, technically speaking. B-Rank is B-Rank. A-Rank techniques are what Hokage, Sannin, and very powerful Jounin can cast. A Genin, especially a non-Jinchuriki, shouldn't ordinarily be capable of A-Rank techniques. Especially looking back to the beginning of the series. Unless, like what Ekirei is saying, you were specifically taught them over a period of time in your childhood. But, again, even then that really isn't a Genin level ninja though. 

Also, lol, the Raikage's Lariat isn't a S-Rank technique. 
What I would think would be better is if your character [i]learned[/i] some of your more advanced techniques in the future if they didn't have some spectacular teacher that taught them the techniques in the past, Expllo. 

What a lot of people seem to be doing in this Rp is really beefing up their Genin characters. Really not necessary at all. Don't absolutely have to start out with so many techniques as a Genin.