As Collateral Angst states, "Some stories make things even worse by having the casualty apologize for being hurt. They will use phrases such as "being a burden" or "letting you down" to express their guilt.
They are the Butt Monkey, The Woobie, and/or the Chew Toy, and they apologize for it.
Compare Why Did You Make Me Hit You? and Apologizes a Lot. My Fist Forgives You is the inverse of this. [tvtropes.org]