The name "Hero With No Fear" was a designation applied to Anakin Skywalker, who was both a Jedi Knight and a General, during the time of the Clone Wars. The event that led to this nickname occurred in 22 BBY on Cato Neimoidia, when he jumped in to rescue Obi-Wan Kenobi during a critical operation. The wide distribution of transmissions relating to this highly publicized event across the HoloNet resulted in Skywalker being given the title "Hero With No Fear" by news outlets like HoloNet News. This was done as a form of propaganda during the war, much to the irritation of Jedi Master Obi-Wan Kenobi.
The moniker "Hero With No Fear" was brought back into Star Wars canon through the 2018 publication Star Wars: The Complete Visual Dictionary, New Edition. The designation had its initial appearance in the Star Wars Legends source material "Republic HoloNet News Core Edition 15:01:03," which was featured in Star Wars Insider 72.