Richter was quite amused by the way Rachel was attacking. Unlike her father who lived by the philosophy of one hit one kill, Rachel knew how to keep a chain of attacks going. It was obvious that she had another person teach her this, which she then implemented into her own martial arts. In pure power and speed alone Rachel wasn't at the same level as her father Dan, but in the technique department she has her father beat. This wasn't because Dan couldn't create proper combination moves, he created some, but ultimately he never truly improved them to be able to be used in proper combat, as he was focused in creating a martial art that needed only one attack to win. Rachel on the other hand used what Arthur Glory taught her, and mend them into her father's combination moves, thus creating a style of her own.