Complex sentence: Sadly, Dororo holds no recollection as to whom Zoruru is and tries desperately to remember his name, mistaking him for Girara, Dasasa, and Tosasa; assumed to be his former classmates.
Split into simpler sentences: Sadly, Dororo holds no recollection as to whom Zoruru is. Dororo tries desperately to remember his name, mistaking him for Girara, Dasasa, and Tosasa; his former classmates.