Ola Electric CEO Bhavish Aggarwal on Thursday called late industrialist Ratan Tata his "personal hero". "My relationship with Ratan Tata started in 2008 at IIT Bombay's convocation where he was the guest speaker...In 2015, I got chance to meet Tata and he decided to invest in Ola," he said. Bhavish added that Tata played key role in founding Ola Electric.