It is unlikely - an Outsider's true name does not change without truly earthshaking intervention. But yes.

"Anything else we should know?"

...Mephistopheles is a monster. I know this. But at some time, he may be a useful monster.

And then they're standing in the Sleeping Man's chamber. 

Sensei Dharvana waves politely. 

"Hey. We have learned the identity of the Sleeping Man's true love."

She claps her hands together delightedly. "And it isn't even Wintersday! Who is it?"

"Aribeth. The one who stole his ring."

Bounce. "Oh, how lovely - a paladin fallen and redeemed, loved by an angel in the depths of Hell! I'm so pleased - it wasn't really set in stone, you know, and I was curious which way it'd fall. Do you want to tell her, or shall I? She's taken over the old quarry office."

"Oh, she's here, neat. I'm not really sure how to break it to her though."

"...I might," Jojo says. "Sensei, could you wake the angel?"

"Certainly."

She puts two fingers to her temple, and there's a pulse of energy.

And the Sleeping Man blinks the sleep from his eyes.

"I... are you my One True Love?" he asks slightly blearily of the Sensei.

She laughs. "Gods, no, we'd drive each other mad. These nice adventurers are going to take you to her."

He stands, his legs obviously a bit weak. "I will follow."

"Which way's the quarry office?"

"To the south of the city. It's the great big ugly iron fortress."

They head out. The snow is much lighter than it was last time they were here; they can actually see the office from the temple steps.

"Oh," Jojo realizes, "I should give you back your ring -" He hands the ring to the Sleeping Man.

He accepts it.

"What is she like?" he asks. "My love, I mean."

"She's wonderful. She was - treated poorly, in life - she lost everything, over and over again, and people put her on a pedestal, and when she fell from it they hurt her terribly. She did terrible things, in the end. But she did great things, as well. And - I think she's on the right path, now."

The angel nods.

"How d'you reckon she'll take being introduced to her true love?" Belmarniss wonders in Jojo's direction.

"Rather poorly, if it were phrased like that," Jojo says absently. "Angel - do you have a name?"

"Goravial."

"Goravial. What you must understand is that Aribeth is not yet your love. She may not love you the way you love her for a very long time - and if you idolize her, demand that she love you, treat her as a love in waiting rather than someone you actually like, she may never love you. It is written in the stars that you two can love each other. Do you understand?"

Goravial smiles gently. "I know what love is, mortal. Rest assured, I will not crush the flower by grasping it too tight."