Bilingual teachers of Color navigate many in-between spaces as they forge hybrid teacher identities; Chicana feminist scholars have referred to these crossroads between cultural ideologies, values, and beliefs as spaces of "nepantla." In this qualitative case study, we analyzed the work of 31 teachers from two cohorts of multilingual educators who participated in a summer bilingual endorsement course and subsequent bilingual teacher induction meetings. These teachers identified as Latine, Asian/Asian American, Native American, or multiracial, and taught in Spanish, Vietnamese, Mandarin, Japanese, and English-medium settings. As course instructors and induction facilitators, we engaged participants in a series of multimodal and artifactual testimonio sessions and collected data in the form of multimodal and artifactual testimonios, coursework, interviews, and video recordings of testimonio sessions. Framed by bringing Chicana feminist conceptualizations of "testimonio" and "nepantla" into conversation with theories of multimodal and artifactual literacies, we analyzed participants' testimonios and found they used images, voice, video, and artifacts to unearth their histories; to forge resilient "identidades nepantleras;" and to express connection and solidarity with students that informed their present and future pedagogical practices. This study suggests the potential for researchers and teacher educators to leverage hybrid literacy practices, like multimodal and artifactual testimonio, while creating spaces that facilitate identity exploration and development for multilingual teachers of Color. Significantly, this multilingual teacher identity development allows for articulation of connection and solidarity with multilingual students, which teachers perceive as consequential in shaping their pedagogical and advocacy commitments.