The Mad Hatter said
How do you see Dai and Haruka interacting?
... Until she relizes that he can mock her back about the fact that she's a shrimp in height xD
HUEHUEHUEHUE
Dai and Haruka, hmm… I thought we'd discussed the giant cleaver already, hehe. But otherwise, I see some interesting scenarios when he drives her to become stronger. His bluntness will tread on some feet, I'm sure.
As for Ryuu, Daiken will give him /the friendliest hell/. He doesn't like the brooding type, so he'll be sure to poke at him all the time ("Hey sword boy, come join the conversation!" "Sword boy, don't be so brooding!" And so forth, ad nauseam).