Chiyo can chase knockdown -> H float and H float-> repulse 3 times each for a total of 6 chases.

So if you can do repulse -> knockdown 3 times you can potentially have 60 extra chakra per turn that you c*e for any skill.

Chiyo is a great ninja up to mid game. At that point kage ninjas are vastly superior (as well as some pains).

Chiyo has horrible ninjutsu damage and decent taijutsu, her defense and life is ok. The H float -> repulse chase is pure ninjutsu (the other being taijustu) so it does little to no damage.

I got her and used her a lot as a chakra source for my teams as well as a combo linker. Then I got better summons, SN and mabui which replaced her. It's up to you go get her, she is good but you wont be using her at mid-end game.