"Joshua Wong, 19, is the most successful street activist in Hong Kong.
His televised arrest in September 2014 helped spark pro-democracy protests that would continue for 79 days, paralysing the heart of the city.
But they ultimately failed to win any concessions from the Chinese government on greater voting rights for the territory's residents.
Mindful of that failure, Mr Wong is stepping into an unfamiliar role: general secretary of a new political party called Demosisto.
"Street activism is not enough if we want to fight for a better future," he tells me. "We have to enter the system, create a political party and shape the political agenda, in order to drive forward our movement for self-determination."
Read Joshua Wong's inspiring story on BBC News