This work builds upon Elizabeth Archuleta’s (Yaqui) term “ethos of responsibility” by contextualizing it within the #NoDAPL movement and applies a cultural rhetorics methodology to constellate an understanding of an ethos of responsibility utilized by Indigenous women water protectors in the #NoDAPL movement, as seen in video-recorded interviews selected from the #NoDAPL digital archive. This study attempts to understand the rhetoric of Indigenous women water protectors through the lens of Indigenous feminism(s), Indigenous rhetoric(s), and Dakota/Lakota/Nakota history and worldviews. When speaking from an ethos of responsibility, the water protectors featured in this study locate agency in traditional teachings and in the experience of Indigenous women, including responsive care in/to the interconnectedness of life, the special role of women in the care of water, and the collective survival of Indigenous women in colonial and patriarchal violence.