Yusuke Momochi is a Japanese professional fighting game player specializing in Street Fighter. Momochi won the Capcom Cup 2015 championship, as well as winning the EVO 2015 title for USFIV. Momochi is signed with Team Echo Fox, along with Justin Wong. His characters of choice are Ken and Karin.
While Ryu is the more serious and stoic of the two, Ken is the complete opposite - flamboyant, unorthodox and unpredictable. He is an alpha male with a giant ego and constantly reminds his opponents about his greatness. While he can be brash, egotistical, and arrogant at times, his heart is pure. He is generally kind, friendly, a good person, and very easygoing which led him into starting a family of his own. He never backs down from a fight no matter how difficult it looks.
Karin's laugh and mannerisms are derived from the unpleasant "ojou" stereotypes common in anime and manga as well as the "rich person"/"popular schoolgirl"/"spoiled brat" stereotypes of Western fiction; while she typically remains snobbish and haughty as per the standard, other aspects of her personality can vary wildly in other media. In Namco x Capcom, Karin is calmer, more level-headed and cynical, and serves as the voice of reason for the impulsive Sakura (though she still retains her trademark laugh and condescending comments during battle sequences).
Even though Ibuki is a well-trained ninja, she is still a normal teenage girl, and states on several occasions that she finds her ninja garments ugly and her daily training strange. She also has a typical interest in boys; in several of her win quotes in Super Street Fighter IV, she evaluates her opponents based on their looks, behavior, and clothing, as well as their fighting performance. She regards Guy in particular as quite a hunk, though she also complains about his non-traditional ninja garb. Ibuki is also very conscious about her weight, as mentioned in her Street Fighter X Tekken winquote against Bob and her Arcade mode ending in Street Fighter V.