Carbon fibres are essential for lightweight, high-performance applications in wind energy, automotive, and aerospace sectors; however, conventional fibres are predominantly derived from fossil-based precursors, resulting in energy-intensive production and limited sustainability. In the context of the Blade2Circ project, Deliverable 1.3 focuses on evaluating the properties of carbon fibres developed from lignin, an abundant and renewable by-product of the paper industry, as a greener alternative for wind turbine components. Lignin-derived carbon fibres were successfully produced, upscaled and systematically characterised to determine their surface morphology, mechanical performance, and wettability, providing a comprehensive assessment of their suitability for composite applications.