Riken D. Garland is one of the eighteen powerful vice admirals of Marine Headquarters. He is strong.
He specializes in taking on the elite forces of pirates and picking fights with all kinds of suicidal pirates.
He has even fought the Four Emperors: Kaido willingly let himself be captured, Whitebeard didn't care, Shanks was still sleeping off a hangover, and bad luck struck Big Mom's fleet, with a single electromagnetic cannon blast destroying two of its divisions...
The stories about his battles with the Four Emperors may be exaggerated, but he is still pretty impressive.
He is helpless when it comes to women in desperate circumstances and always likes to lend a hand, which has left him with some financial troubles.