animeblend
Member
Kakashi's personality and character has always been tempered by Gai's lighthearted personality. There is no doubt Kakashi would not be the same person without Gai's help. How many missions have we seem those two go on together? It is extremely hard to imagine Kakashi going on after the war like business as usual if his main best friend in BOTH Naruto and Naruto Shippuden dies.