Common Fano-resonant plasmonic nanostructures, such as dolmen structures , nanoparticle oligomers , and Fanoshells , are typically two-dimensional patterns or nanoparticle assemblies. A key challenge in designing colloidal Fano-resonant single-particle nanostructures is achieving the required structural complexity within a single, synthesisable nanoparticle while ensuring precise tunability for establishing resonance alignment between bright and dark modes. Moreover, for SERS applications, such resonance alignments must be robust against external perturbations. This robustness can be achieved if both modes are independently modulated by parameters critically affecting spectral resonance positions-a strategy known as "topological Fano resonance," which exploits the independent modulation of intrinsic bright and dark modes .