The answer is Henry was making excuses for not rejoining the fight
The true meaning of the word "benign" in this sentence is - harmless. It is the word that originates from Latin word "benignus". In medical terms, it refers to something that does not cause death or serious injury. Also, it is most commonly used to describe tumors which are not cancerous. The famous American film director once said: "The most beautiful words in English are not 'I love you' but 'It-s benign'." This word can also be used to describe one's character, meaning that he or she is kind, gentle and that can hardly harm anyone.
she undergoes significant character changes and growth.Chopin develops Louise’s character primarily through internal thoughts. She gives us a vivid picture of Louise’s psyche—all her thoughts and feelings are laid bare. Chopin’s description of Louise’s internal thoughts also gives us a hint of what lies behind the character’s motivations.