With the rise of aggressive China, the indo-pacific region has taken a central stage in the security posturing of regional and global powers. In this context, the reinvigoration of Quadrilateral Security Dialogue (QUAD) mechanism, an informal consultative platform comprising Australia, India, Japan and the United States, has drawn major attention. In this CSSAME issue, both the scholars debate the less-talked about role of Taiwan in relation to Quad’s aims and mechanisms. Taiwan is analyzed as a vital piece to the successful progression of both traditional and non-traditional security ambitions of Quad nations. Though there is a hesitation in predicting a real time participation of Taiwan in the mechanism itself in near future, both the authors agree on the shared normative interest of the four nations and democratic Taiwan in ensuring ‘free and open Indo-pacific’. The issue also points out that any active engagement of Taiwan with QUAD mechanism immensely depends on its bilateral relations with India and India’s eagerness to reinvent and repurpose its Taiwan approach.