Slayers are all naturally flimsy and are encouraged to build heavy-damage builds, however, they all also have things in their kit that can allow them to conditionally mitigate, avoid, ignore, or heal through enemy damage. Fiora has Riposte and Grand Challenge, Riven has Valor, Yasuo has his passive shield and windwall, Tryndamere has his heal and undying rage, Master Yi has alpha strike and meditate, Jax has counterstrike and grandmaster's might, Ekko has parallel convergence and chronobreak, and Kled (he was described as one in his champion description from Riot so I'll put him here) has Skaarl and CHAAAAAAAAAARGE!