There's a sharp crack! And then, suddenly, they are sharing their little rock with another... being. Small, wrinkled, greyish-green and spindly, the being is wearing a loincloth made out of a tea cozy and nothing else, and immediately upon appearing they throw their tiny body at the strangers feet with a cry of, "Master Regulus! You is being alive!" And start sobbing into his robes. 

Gah. This causes Teddy's feathers to hackle. Remarkably cat-like for something that is three kinds of creatures none of which is cat-like.

Calm down.

"...Hi?"

Kreacher is too busy crying to reply to Teddy's greeting right away.

Regulus sets a hand on Kreacher's back and tries to keep focusing for a little while longer, "Yes- Kreacher I need you to take us to the safe house..." 

"-Ye-yes, Master Regulus-" Kreacher pulls himself together enough to look up at Teddy, "Who is it? Rescued Master Regulus, it did?"

"My name is Teddy. I am a he." He changes, so he is mostly human, wearing muggle-looking jeans clothes, albeit reinforced ones. Only his arms are still feathery.

"Hmmmmm..." the little being grumbles up at him, suspicious.

"Kreacher. Safe house," Regulus repeats.

"Safe, yes," Kreacher nods rapidly, suspicion clearing completely in favour of adoration as he turns back to look at Regulus, and then he snaps out a hand to grab onto Teddy's jeans, and he is treated to the second unexpected teleportation of the night as they twist out of existence in that one spot and reappear in another one. 

Teddy rubs his forehead and tries to not be too disoriented. Oh, also, he maybe should get Regulus on a comfortable surfice is there is one available.

There is a bed! Right there, next to where Kreacher popped them both in, conveniently placed so that Teddy barely has to move to set Regulus down on it. 

Teddy lays down Regulus in the bed. To Kreacher he asks. "Do you know how to help him?"

Regulus curls up on the bed as soon as he's been set down, burying his face back into his robes and shuddering, making soft noises of distress.

"Master Regulus is drinking a very terrible potion," Kreacher tells him, climbing up onto the bed and hovering worriedly over Regulus' form, "Kreacher is not knowing what it was, not knowing how to treat it - oh Master Regulus Kreacher is being sorry!" He wrings his hands unhappily. 

Teddy really wishes Felix was here. He would offer Kreacher a hug and mean it. Teddy is not comfortable with that. Poor creature. "Kreacher could get help? A doctor? Someone with healing magic?"

"Kreacher- Kreacher could... not many people is being safe for Master Regulus. Turned against the Dark Lord he has... Kreacher told no one, but He must know, He knows all, Kreacher cannot be going to Mistress Narcissa..." Fretting, Kreacher reaches up and tugs on his ears, "The traitor is being a healer, Kreacher overheard Mistress saying, but she would not come, no..." 

"Dark Lord? And hey, don't... be hard on yourself, it's not your fault. Why are people not safe?"

"The Dark Lord is being a very powerful wizard, Master Regulus is serving him, just like Mistress Bellatrix and Mistress Narcissa's husband and all respectable wizards. But he is doing something... bad. Terrible. Master Regulus is asking Kreacher to take him to secret place where terrible thing is being hidden, Kreacher is doing so, and then Master Regulus is telling Kreacher to leave him!" Having gotten onto this tangent, Kreacher bursts into tears and falls to his knees next to Regulus, joining him in weeping into his robes.

Teddy tentatively pats Kreacher on the back. "There, there, you did all you could."

Kreacher shudders under his hand and keeps crying.

This looks likely to go on for a while.

This is awkward. And Teddy is full of questions (Wizards?!?).

Maybe he should figure out his surroundings first. Where are they?

This particular place is a small, windowless room, containing the bed, a desk, and three and a half walls of bookcases. The room is lit by what appear to be oil lamps, though they don't seem to be giving off any smoke, and much like the lamps the décor of the rest of the room appears to be at least a century out of date compared to what Teddy is used to.

There are two doors leading out of it, both currently closed.

Are the doors locked? Teddy eyes the books and reads the titles.

There's a wide variety here- a number of them do not have titles, some of them only have dates, many are labelled in other languages - Latin features prominently, but so does French, Gaelic, German, and many more. The ones in English have names like '203 Unorthodox Uses for Harmless Charms' and '1001 Magical Herbs and Fungi' and 'The Interactions of Venus'. 

The doors, if he checks them, are not locked - one leads to a bathroom, and one out into a short hallway featuring two more doors.

What... the hell. He leaves the ones labelled after dates (Journals?) and checks the ones about Herbs.