Narin is truly amazing. Even though she looks very slender, she has incredible stamina and really knows her way around working out. When a pawmpawm asked her how many times she could dance to Hit 'Em back-to-back, she said she could do it 5 times in a row (sorry, I forgot to take a screenshot).
Plus, her dance style has great dynamics and control, which clearly requires immense muscle control. She also has incredibly stable vocals while dancing, and she honestly sounds just like the CD. She’s a total stamina monster!