Major Sergius Saranoff is a character from the play "Arms and the Man" by George Bernard Shaw. He is a Bulgarian officer who is portrayed as a romantic and somewhat naive figure, embodying the ideals of military honor and bravery. His character often contrasts with the more pragmatic views of other characters in the play. Saranoff is engaged to Raina Petkoff, a young woman who idolizes him and the notion of heroism. Throughout the play, his interactions reveal the absurdities of war and the disillusionment that can accompany it, ultimately challenging traditional notions of masculinity and valor in the context of conflict.