Complex sentence: An Interpol agent, she is investigating M. Bison's "Shadowlaw" organization suspected of murdering several diplomats, and requests to work with Guile; he initially balks at this as he wants to pursue Bison himself, but later they become inseparable.
Split into simpler sentences: An Interpol agent, she is investigating M. Bison's organization of "Shadowlaw", which is suspected of murdering several diplomats. She requests to work with Guile to investigate Bison's organization, but he is initially reluctant, more eager to pursue Bison himself, but later they become inseparable.