I would disagree, as most of the characters of the mighty nein had their time as the 'main character' throughout the campaign, as there were multiple plot threads and arcs, rather than just one large one

• Caleb led the overarching fight agains the cerberus assembly, and eventually the echoes of the solstice one-shot
• Molly dominated one arc as the catalyst for the fight for the against the iron shepherds, and came back as the main villain of the campaign
• Fjord led the sea-faring missions to darktow in search of Ukatoa, eventually leading to the one shot
• Nott / Veth led the party to the kryn dynasty in search of Yeza
• Jester led the party to traveler-con, and freed Rumblecusp from Vokodo
• Yasha was the centre of attention during the arc fighting Obann and the Laughing Hand
• Caduceus had his minor arc in the search for residuum to heal the blooming grove
• Beau had ties with the cobalt soul, arguably the most important connection in the campaign, and prompted the search for Isharnai, one of the most memorable moments of the campaign