He clearly can just take her. Look at this thing he's doing now, taking her. 

The other druid, who had been standing there like a coward finally speaks. "Leave it, Kagha. She meant no harm, and she's not doing it again."

"I'd say she's been discouraged." Wyll sounds like he's had cat hair shoved down his throat.

Cayden can very much take her, past the circle of druids chanting around the idol she tried to steal, and past the guards.

There are only two tieflings left at the bottom of the stairs, waiting nervously until they see the child. "Arabella--?"

"Mum! Dad!"

Adorable family reunion!

He keeps an eye on the adorable family reunion, and also checks if Shadowheart or Astarion are in whispering distance.

The family reunion is adorable, with lots of hugging and crying and "oh my god don't do that again."

Both Shadowheart and Astarion are in whispering distance.

To Astarion: "Foppish guy over there might be a good person to flirt with if you want to have something to do that's clearly not getting involved in my random acts of heroism."

Is Cayden getting him to procure food... for himself? He's not sure how to feel about that. 

"I'll see if I can get something out of him while you go off and be heroic."

"...Not eating him," Cayden clarifies. "We don't need that problem. Just, you know, the normal non-food reasons you might want to seduce a random idiot. If you can't think of anything else to do, I'd appreciate if you could get some valueless magical trinket off him."

"I'll meet you when you've finished your heroics." And off he goes, fop-wards.

To Shadowheart: "Thank you."

"Safety in numbers. Anyway, you're the only one guaranteeing me my duel."

"I'd suggested Lae'zel go first. You could have watched her get poisoned and solved your problem completely. And you didn't, and I appreciate that."

"It takes long enough to act that you'd have it stuck in you too if I didn't stop her quickly," she lies. 

"Well, anyway. Thanks."

Are the tieflings done with their reunion?

The tieflings are done with their reunion! "Thank you so much," the mother of the family says. 

"I'm worried I made you a target. I'm not going to be able to stick around here for long. Is there... anything I can actually do to help?"

She sighs. "Not anything you can do easily. If you can convince the druids to stop the Rite of Thorns, or make the road safe to travel, that would help."

"I'd say that I'll see what I can do, but diplomacy is not my strong point. What's the Rite of Thorns?"

"The druids are using in to close off the Grove. Keep them 'safe.'" He is speaking carefully because of young ears that he doesn't want to get encouraged to steal anything again. "We'll be cast out to fend for ourselves. Which wouldn't be so bad if the road to Baldur's Gate wasn't blocked by an army of goblins on a war path."

"Aroden's feces. I'm sorry. How long do you guys have?"

"They aren't saying how long the Rite will take. A few days, I'd guess."

"--I'll do my best to come back before then to help guard you, but I can't make promises."

"We don't expect you to. We survived our city sinking into the Hells, and we'll survive this."

"Do you have thoughts on Master Halsin?"