He makes a brief chuckling noise--brief as to ensure his hands don't shake. "Don't want to bring back bad memories for you, so just take it as I remember from observation."

Obviously, Rai doesn't elaborate. He just continues cutting away at hair, careful and precise.
The bad thing about Rai and his control over just about everything he does and says is that there's no way to tell how he's actually doing.

"Hey hey hey," Rai warns, retracting the scissor away from Dion's hair.
Well, the part he's looking at doesn't seem to be the part Rai was working on.

"I considered starting on that side, yeah," Rai states. "But my instincts said that'd be a bad idea somehow, so...nope."

"And I thank you for the trust, sir," Rai says, once again smirking like the Smirkster he is. "In fact, if I mess up, I'd probably feel so bad that I'd pay you for the damages. So until then, rest easy and...hmm, well, hope you don't get paid at the end, I suppose."

"Well, Wiley can make hair grow or whatever he does, so while the compensation might not result directly in that, at least it's not irreversible like usual," Rai says, keeping the scissors away from cutting edge range while he slightly shrugs. "By the way, please don't do that again. The straightening thing, I mean. I might not react fast enough."

"He doesn't? I thought it went the other direction." Rai laces a tiny bit of surprise into his question. "Well, I will try to do that, yes."

Rai goes back to the art of snippity snippity.
"Well, to be honest, I'm not too sure either. But for me, it's less of a 'Why am I friends with him?' question than it is a 'Why did he choose to befriend me?' one."

Rai doesn't mind. He's not much of a talker himself. He goes snip-snip. 

(Is there really more that needs to be POVed for the haircut?)

The deed is finished, my lord--
Rai does the rare fourth wall break where he raises an eyebrow at the narrator like "are you okay," and the answer is, "No, I'm not okay, why would you ever think that?" 
Anyways, yeah, the de--Rai, you don't have to look at me like that--the haircut is finished. Though still unbeknownst to Dion, the haircut has gone well. In fact, Dion's hairstyle is currently almost exactly like the picture, plus a few instinctive changes Rai put in place that he would daresay are improvements from the original. This time at least, Rai wasn't too complacent for his own good. He's done well and deserves a pat on the back. Or just something a bit more than a simple thanks, which he's probably not gonna get, but that's to be expected and he doesn't expect that "something a bit more." 

For some reason, before the narrator read "still and silent," their mind automatically filled in "mad." What an impression.
"Yeah." is the very simple response.

"No mirrors. Just screens."

"You might have more luck with a puddle outside," Rai informs helpfully. He bends down the correct way to start cleanup.

"Do whatever. Suit yourself," goes Rai, slowly deciding that brooms really are handy even though he had the foresight to put down the wrap to catch the hair beforehand. He thanks himself for his wisdom. Dion's hair would be hard to see against the color of the floor. Good for him for thinking ahead.