Eimear Lambe jokes that her big sister Claire is "a bit rats" that she is now known as Eimear's sister rather than the other way around.
But the 23-year-old admits she was inspired to follow in her sibling's footsteps and become an Olympic rower.
Claire and Sinead Lynch got to the double sculls final in Rio but finished in sixth place.
But, weather permitting, Eimear and her coxless fours colleagues will try to surpass that achievement by winning a medal in today's final in Tokyo.
By a quirk of fate, Claire - who retired in 2018 at 27 - is part of RTE's coverage of rowing at the Sea Forest Waterway.
Speaking before the Games started, she laughed that she would get no sleep as she watched the progress of the challenge of all six boats.
Five still remain and are primed to push for glory in the coming days, after the sessions on Monday and Tuesday were cancelled due to a forecasted tropical storm.
And so she has been analysing the progress of her sister, Aifric Keogh, Emily Hegarty and Fiona Murphy through a very impressive start that saw them just edged out by their strong medal rivals Australia in the semi-final on Saturday.
For Eimear, 23, her big sister was always someone to follow.
“She definitely was," the Cabra woman said.
"The Olympics always seemed so far away and something that wasn’t achievable.
"You always think of Usain Bolt and all these amazing superstars.
"But when I saw my sister do it, I was like, ‘oh I know her, she’s normal enough, if she can’t do it, why can’t I...why can’t anyone?’.
Given the circumstances, Lambe acknowledges that it is special to be able to emulate her sibling by reaching an Olympic final.
“It’s definitely amazing," the two-time European bronze medallist. "I was getting videos and stuff of them all at home.
"She’s even getting so emotional watching them. It’s amazing.
"I think she’s getting a bit rats that people are calling her my sister now instead of me being Claire’s, but it’s cool!"
Eimear couldn't make it to Rio to cheer Claire on as she had her own racing commitments to deal with back home.
But she doesn't feel that she is missing out on the sort of experience that Claire enjoyed.
“No, it’s hard not having family not here and stuff and I think they’re a bit disappointed," she said.
"My parents went to Rio so they’re a bit disappointed not to be able to go to it.
"But they’re at home watching it now and getting the videos is great. The support is still there."
