The present study investigates mechanical, thermal, and tribological characteristics with the influence of novel composite material of perforated polyethylene terephthalate (PET) polymer, distinct natural fibre, and vinyl ester matrix produced by compression moulding technology. The primary objective of this study is to identify and influence the strength of vinyl ester resin bonding features of three distinct natural fibre sources: banyan, snake grass, and pineapple with recycled PET plastic bottles polymer composites. The natural fibre is undergoing chemical treatments using NaOH (7% alkali) in order to remove the impurities and enhance the strength of the composite material. The mechanical characteristics of the produced composites (PC1, PC2, PC3) were assessed using tensile, flexural, and impact tests. The study also encompasses an investigation of thermogravimetric analysis conducted on natural fibre/PET/vinyl ester composites, demonstrating the impact of distinct fibre with PET polymer on thermal characteristics. Moreover, specific wear rate and coefficient of friction analysis explore the distinct character of developed composites. Using natural fibre reinforced/vinyl ester composites in conjunction with PET offers a promising avenue for achieving lightweight structural applications due to the PET composite's favourable mechanical properties and heat resistance.