On Star Trek: Discovery Season 4 Episode 12, the First Contact delegates are Ndoye (Phumzile Sitole), T'Rina (Tara Rosling), Saru (Doug Jones), Burnham (Sonequa Martin-Green), Rillak (Chelah Horsdal), and Hirai (Hiro Kanagawa)
On Star Trek: Discovery Season 4 Episode 12, Burnham (Sonequa Martin-Green) leads the delegation composed of T'Rina (Tara Rosling), Saru (Doug Jones), Rillak (Chelah Horsdal), and Hirai (Hiro Kanagawa)
Culber: We collected sixteen complex hydrocarbon compounds from the Ten-C's former planet. Each conveys a different emotion -- terror, love, sadness, curiosity, peacefulness... Hirai: ... which is the one that concerns us now. Our contingency plan entails using that hydrocarbon to try to start the communication process. Basically, 'we come in peace,' in chemical form.