A few examples:
Jiraya - Urokodaki
Minato - Ubyashiki
Sai - Rengoku
Gaara - Akaza
And my personal favorite comparison:
Iruka - Muzan
Sai - rengoku is kinda unexpected but they have similar personallitys they are both clean minded sai is more calm, gentle and soft voice tone but rengokus sounds like the tiger from frosted flakes kinda
What do you think?
