According to The Age:
RICHMONDAFL: Another club with many candidates to choose from. Dustin Martin, Trent Cotchin, Dylan Grimes, Nick Vlastuin, Jack Riewoldt, Liam Baker and Dion Prestia all fit the bill nicely, but ruckman Toby Nankervis truly epitomises what the Tigers are all about. He took to the co-captaincy like a duck to water in his first season in the job last year, producing arguably the best season of his triple -premiership career as he led from the front brilliantly. Richmond walk that little bit taller when Nankervis runs out with them.
AFLW: Courtney Wakefield would have been a shoo-in for this had she not retired at the end of last season but, even then, it would have been hard to ignore what Katie Brennan has done for the club. Joining in 2020 as an inaugural player and captain, she led by example through the rocky first years before leading the side to its maiden finals in season seven. Despite having stars on the list, there’s a notable difference in the ferocity of the group when she’s on the field.
https://www.theage.com.au/sport/afl/afl-2023-who-s-your-club-s-heart-and-soul-player-20230102-p5c9v1.html