Tā yī fù shě wǒ qí shuí de yàngzi, zhǔdòng jiē xià le rènwù.
With a 'who else would it be' air, she took on the task herself.
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From 《孟子·公孙丑下》: '如欲平治天下，当今之世，舍我其谁也？' — 'if we wish to bring order to the world, in this age, who but me?' Mencius's bold self-assertion became the template for the idiom.
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Conveys strong self-confidence — admirable bravado or arrogant grandstanding depending on context. Common with 气势, 精神, 的样子. Often rhetorical rather than literal: the speaker is claiming they're the right person for the job.
