Kosaksi Pasupugazh (played by Vijay (Tamil)), – A young, energetic and supposedly wealthy college going student who is passionate about engineering. Though Rancho wants to be an engineer, he leans more towards inventing rather than seeking a job in an MNC, unlike his other college mates. According to him, one's profession should be something he/she loves doing, irrespective of how much it pays. He also keeps stating throughout the film that one should run after excellence, not after success. Rancho also believes in the concept of "All Is Well", in which people should focus on the present and live it as it is, instead of worrying over the future. There are many significant differences between the Ryan and Rancho characters, both in their background and attitudes. Hari Kumar: Farhan Qureshi (played by Madhavan (Hindi))/Venkat Ramakrishnan (played by Srikanth (Tamil)) – The narrator of the story, a young college going student who loves wildlife photography, but is being forced by his parents to become an engineer. Hari's background (as acknowledged in one chapter of the book) was not elaborated upon. However, Hari seemed to be auto-biographical and the "Krish" character in Chetan Bhagat's 2 States (who apparently continues on from the Hari character) would provide greater details about Hari's background. Alok Gupta: Raju Rastogi (played by Sharman Joshi (Hindi))/Sevarkodi Senthil (played by Jiiva (Tamil)) – A young and insecure college going student who isn't confident enough to deal with problems in life all by himself and always relies on God. Raju's only mission in life is to pull his family out of poverty, improve their economic status and get his elder sister married. This character is very similar to the one in the book. Prof. Cherian: Viru Sahastrabuddhe (Virus) (played by Boman Irani (Hindi))/Virumaandi Santhanam (played by Sathyaraj (Tamil)) – A hugely competitive, efficient, strict, and disciplined man who has been running the Imperial College of Engineering (Ideal Engineering College in Tamil) for the last three decades. He believes that life is a race, the ones who are not efficient about work and time get crushed. He sneers at Rancho's concept of studying for knowledge rather than marks and constantly spars with him and his friends due to this. He is known as "Virus" among the students. Virus has a greater role at the college when compared to Prof. Cherian. Neha Cherian: Pia Sahastrabuddhe (played by Kareena Kapoor (Hindi))/Ria Santhanam (played