Ferrotter
The End wasn't The End - Found a new home after the great exodus of 2012

@Ebalosus  
In the actual production materials, Lyra was neither Lyra nor Heartstrings. She was just “Incidental Unicorn #2”.
Ebalosus
Lunar Supporter - Helped forge New Lunar Republic's freedom in the face of the Solar Empire's oppressive tyrannical regime (April Fools 2023).
Silver Bit -
Sapphire -
Happy Derpy! -
Bronze Supporter -
The End wasn't The End - Found a new home after the great exodus of 2012

Build commie blocks!
@Background Pony
 
I know I know, the addendum about “Heartstrings”, was more in jest than anything serious
Background Pony #598C
@Ebalosus  
All but one of Lyra’s official toy releases call her Lyra Heartstrings, not just Heartstrings alone, so I’m pretty sure she’s unaffected here.
Amber

@Background Pony
 
Not bad.
Background Pony #B66A
@D50  
The most cunfuzzling part with that is her other cutie mark is the same as Cloud Kicker’s.  
BGP is confused!  
Cloudchaser has a split personality named Stormwalker whose cutie mark is the same as Cloud Kicker’s.  
It hurt itself in confusion!
D50
The End wasn't The End - Found a new home after the great exodus of 2012

They should just go with what I’ve been saying for months: Cloudchaser has split personalities, and her cutie mark changes to match them. Now we can name one of them Stormwalker.
FanOfMostEverything
Derpy! - For Patreon supporters
Cool Crow - "Caw!" An awesome tagger
Magnificent Metadata Maniac - #1 Assistant
Lunar Supporter - Helped forge New Lunar Republic's freedom in the face of the Solar Empire's oppressive tyrannical regime (April Fools 2023).
Non-Fungible Trixie -
Preenhub - We all know what you were up to this evening~
My Little Pony - 1992 Edition
Silver Bit -
Ruby -
Wallet After Summer Sale -

Planeswalker — FoME
So, either Cloudchaser or Stormwalker is capable of macroscopic quantum superposition. And here I thought only Pinkie could pull that off.
Background Pony #D051
Cloudchaser the Stormwalker…has a nice ring to it.
PwnyBrony32

I prefer Cloudchaser
Background Pony #49DA
New headcanon! Due to an unprecedented bureaucratic error, Cloudchaser’s name is both Cloudchaser AND Stormwalker.
Background Pony #B66A
@gg666  
One personality chases clouds and one walks on storms?  
…  
…maybe the Stormwalker side of her is similar to sleep walking?  
another theory  
Whenever Ponyville or another part of Equestria is scheduled for a large storm, one pegasus remains to monitor the storm for any irregularities, like a fire caused by stray lighting, or perhaps to rescue ponies who haven’t taken shelter?  
That pony is the Stormwalker, and Cloudchaser is Ponyville’s primary Stormwalker.
Background Pony #DC8A
Show canon > Book “canon”
gg666
The End wasn't The End - Found a new home after the great exodus of 2012

split personality fanfic?
Background Pony #B66A
relicariox

dupe sensor fail >___>
B2C
The End wasn't The End - Found a new home after the great exodus of 2012

D D D Dupe!
Ferrotter
The End wasn't The End - Found a new home after the great exodus of 2012

>>http://www.youtube.com/watch?v=6M9T5aTVwNs approximately 3:40 in. “Stretch those glutes, Flitter! NICE flexibility, Cloudchaser! A LITTLE too much flexibility, Blossomforth! Uh, somepony give Blossomforth a hoof?”
Ebalosus
Lunar Supporter - Helped forge New Lunar Republic's freedom in the face of the Solar Empire's oppressive tyrannical regime (April Fools 2023).
Silver Bit -
Sapphire -
Happy Derpy! -
Bronze Supporter -
The End wasn't The End - Found a new home after the great exodus of 2012

Build commie blocks!
@Takashi.0
 
Yes, directly by Rainbow Dash
Takashi.0
Since the Beginning  -

Salt Miner.
@Ebalosus  
Was she actually referred to in-show as Cloudchaser?
 
It’s been a long-ass time.
Ebalosus
Lunar Supporter - Helped forge New Lunar Republic's freedom in the face of the Solar Empire's oppressive tyrannical regime (April Fools 2023).
Silver Bit -
Sapphire -
Happy Derpy! -
Bronze Supporter -
The End wasn't The End - Found a new home after the great exodus of 2012

Build commie blocks!
@Rainbow Dude
 
In that case, going by the precedent set, with show names being more canonical that EU names: Cloudchaser is “Cloudchaser” and not “Stormwalker”
 
Not that I have anything in particular against that name; It’d be like if we all suddenly started calling Lyra “Heartstrings”…
Background Pony #2505
@HeroInferno  
They’re slightly different shades of purple, though.
HeroInferno
Not a Llama - Happy April Fools Day!
The End wasn't The End - Found a new home after the great exodus of 2012

Finally a Red Mage
New headcanon, identical twins.
KirbyfanNeox
The End wasn't The End - Found a new home after the great exodus of 2012

Well, it has to be one or the other.
Background Pony #7277
@Background Pony  
Cloudchaser Stormwalker? More like Luke Skywalker.