My Secret Guard Is a Tragic Male Partner Who Cannot Be Loved

My secret guard is a tragic male supporting character who cannot be loved. After being abandoned by the heroine, he went to the Colosseum every day to seek death. I jumped down from the attic and said, "This princess is hungry and she accidentally jumped from the stairs." With eyes wide open, he got up from the ground to catch me, and went to arrange dinner for me resignedly. The hero and heroine are getting married, and he breaks into the enemy's country single-handedly, clamoring to die with the enemy's emperor. I poked my head out from the enemy camp and said, "Are you here? They said they would feed me to wolves later." His eyes widened: "Princess, why are you here?" The hero sneered and pointed at me and the heroine and asked him: "Do you want your little princess or my queen?" He gritted his teeth and said, "Give me the princess back!"