Yeah she's getting the canoe. (The rest of the water isn't much better but at least it isn't glowing.)

They don't manage to get into the canoe, though, before the top of the iceberg shatters, revealing - 

A perfect sphere of ice, and the glow is coming from a person - 

Or a person-shaped spirit, at least.

A person-shaped person, even, just before the sphere erupts in a blinding beam of light.

What the fuck!!!

She pulls her sister down to dodge any flying chunks of ice from the glowing explosion. And squeezes her eyes shut, because fuck that's bright. 

The wind mostly blows the shards up and over, and the glow doesn't last that long.

She looks up when it fades.

Blink blink.

Oh hey, people! Hello people! She waves enthusiastically.

Uh, what?

She... Waves back? "Who are you?"

"I'm Dechen!" She leaps gracefully across the remaining ice over to where Amaruq and Taqqiq are. "It's nice to meet you!"

The energy is a bit infectious. "I'm Amaruq, and this is my big sis, Taqqiq. Nice to meet you too." Pause. "So... How did you get in the iceberg?" And she takes a closer look at the girl. "...And do you want a coat?"

She's dressed in light silk robes, dyed bright orange and yellow. She also has blue arrow tattoos on her forehead and arms. "Nope! I like being able to move." She twirls demonstratively.

"Aren't you cold?"

"Nope!"

Lucky. 

"But,  anyways - how did you get in the iceberg? And what's up with the glowing - ?" The girl doesn't look like a spirit, but Amaruq's pretty sure benders don't glow, even masters...

"Oh. Uh. It's kind of a long story? And not very fun."

"Well, we're a bit stuck until this ice disperses, so we've got time."

"You're a waterbender, right? Can't you just," she makes swooshy motions with her arms, "clear it out?"

"Yeah that's what I was trying to do when I broke the glacier... I'm still learning."

"You must be pretty strong to have done that, though."

Smile! "Not much help without control..."

"This could be good practice."

"If I don't break the ice under us..."

"Someone could have seen that light, you know. We might not be alone for long."

" - Yeah. One of the other villages spotted a Fire Navy ship recently." Trade's limited nowadays, but - news spreads as best it can.