Ciby took the Air Power Medal at first, in front of Thamarai and Varun and later gave it to Thamarai to save herself from the nominations.As Priyanka stored it behind the House's refrigerator, her friend Niroop caught hold of the Medal afterwards. Mathumitha captured the Land Power Medal initially, transferring it to the later Original Holder of the Medal, Priyanka.However, the power can only be used once and is only available till week 10. The 5 housemates who manage to steal the medals win a super power to save themselves from eviction in the future and topple captaincy. In the third week (Day 16), housemates were given a task to steal 5 medals all representing the five basic elements in the world. The show routinely features tasks as part of the gameplay, following are few of the tasks:
Sanjeev Venkat, a television and film actor known for acting in the television series such as Kanmani and Thirumathi Selvam, and in the film Master (2021).Amir, a choreographer known for working in many television shows and movies.
Ciby Bhuvana Chandran, an actor known for his roles in films like Vanjagar Ulagam (2018) and Master (2021).Thamarai Selvi, a commoner contestant and a stage drama artist.Iykki Berry, a rapper and singer, and is also a physician and cosmetic surgeon.Akshara Reddy, a model known for winning the beauty pageant Miss globe 2019 and her appearance in the show Villa To Village (2018).Suruthi Periyasamy, a runway model and sportsperson.Imman Annachi, a stand-up comedian, host of famous kid's show and actor known for his appearance in films such as Goli Soda (2014) and Aindhaam Thalaimurai Sidha Vaidhiya Sigamani (2014).Nadia Chang, a model, and TikToker who hails from Malaysia.Chinnaponnu Kumar, a folk singer, who is known for singing many folk songs.
Namitha Marimuthu, a model and actress, is also the first transgender contestant to enter Bigg Boss Tamil.Abishek Raaja, a narrator and YouTuber.Mathumitha Raghunathan, a fashion designer, and model from Germany.Raju Jeyamohan, an actor known for his role in Natpuna Ennanu Theriyuma and the television series Naam Iruvar Namakku Iruvar Season 2.On set for the weekend episodes after the ease of Covid 19 restrictions in Tamil Nadu.
Two more promotional teasers were released in September 2021, featuring different commentaries from Kamal Haasan. On September 4, 2021, incorporating a paradigm shift in a Tamil wedding scene and co-relating it with the Bigg Boss house. Instead of last season's Tamil cultural theme background with contrast sparkling colors, this season's theme mainly keeps up natural colors in the background including pink, orange, green, blue and yellow.