In London's Memorial Cup opening 6-2 win against the host Red Deer Rebels, Tkachuk goaded defenseman Haydn Fleury into taking a roughing penalty, then assisted on the ensuing power-play goal to give the Knights a 1-0 lead.
"He loves getting under teams' skin and he's really good at it, but he's also a guy that can go back and put it in your net," Marner said. "He's scary on both ends of the ice and he's probably not fun to play against, but on your line, you love him."
Tkachuk has three goals and three assists in three games at the Memorial Cup and has made his share of enemies with his agitating game.
"I just think it's one of those things, I guess it's a gift being able to get under people's skin," Tkachuk said. "I know even if I don't do anything, people seem to come after me, and that's something that I guess comes with the job."
London go into the final Sunday on a 16-game winning streak. The Knights won 13 consecutive games in the OHL playoffs on their way to the league title.
"We want to keep this going," Tkachuk said. "We're one win away from capping, probably, one of the best seasons in junior hockey history."
MEMORIAL CUP OF JOE What we learned: It is not a good idea to continually give London power-play opportunities. The Knights were 3-for-7 on the power play in the victory against Rouyn-Noranda. They are 9-for-20 in three games at the Memorial Cup.
Key moment: With Rouyn-Noranda on the power play, trailing 2-1 in the second period, Huskies goalie Chase Marchand misplays a puck cleared down the ice, allowing London forward Max Jones to get to it first in the goaltender restricted area behind the net. Jones passes the puck to Marner in front of the net, who freezes Marchand with a fake and returns it for a tap-in to give London a 3-1 lead with the shorthanded goal at 17:28.
Player of the game: Marner, who had four assists in the win. Marner has two goals and 13 points at the tournament, putting him within three points of the Memorial Cup record shared by Jeff Larmer of the Kitchener Rangers (1982) and Guy Rouleau of the Hull Olympiques (1986).
Quotable: "Knowing Mitch, he probably doesn't even care about the record, he's more of a team guy. He wants to score because he wants to win, he doesn't want to score because he wants to break a record. I don't even know if he even knows what the record is, he wants to score and lead this team." - London forward Max Jones
Wednesday's game: Red Deer vs. Brandon (8 p.m. ET; SN360, TVA Sports 2, NHL Network tape delay 9 p.m. ET).