Netizens are impressed by the rookie girl group's live singing abilities.
Netizens highly praised Purple K!SS in comments under "clean mr removed" clip.

"Their vocal stability is better than those groups who are in the industry for how many years already"

"Swan's voice is more stable than my life"

"they are better live than half the kpop groups I've ever heard lol and they just debuted..."

"Some groups don't even try to sing but here we see a 4th gen group who just debuted and are already proving their talent"

"I just realized that they were shaking and very nervous, I think because it was their first time singing live."

"PLEASE THE STABILITY THEY HAVE FOR A ROOKIE GROUP"

"Swan's vocals are so crazy stable!"

"Swan will make her name on the top vocalists I'm telling you"

"Yuki is best rookie rapper"

"And this is why the line distribution is like that, Goeun and Sujin (Swan) were ready and strong enough to sing the majority of the songs. the other members voices are already strong but they just debuted and are not ready yet to be singing live for all their lines. but you can already tell in later comeback they will be STRONG AND CLEAR AS HECK ON STAGE heheheheh"

"Best vocals rookie 2021"

"Wow, Swan slayed."

"Swan’s stability is amazing wow!! She slayed this"

"This is how an actual mr removed perf sounds like. If they had a hand mic it would've sounded better but they still made an awesome job"

"The rap line omg perfect"

"Ughh.. they're just getting started and we are already getting this quality.. wonder how they will evolve as time goes by... I'll definitely keep on supporting them.. love these girls"

"They are so stable"

"Yasss RBW’s Artists never disappointed us"

"Did we really need to do this? I mean it's RBW...;)"

"Mamamoo younger sisters"

"Did Solar give them CDs for breakfast and dinner?"

"Goeun slayed! She is the most stable in the first half of the performance. Then, Swan and Yuki on the last part. Amazing!"

"Yuki your rap is just fire

"THIS IS SURPRISINGLY GOOD FOR A ROOKIE GROUP"

"As expected the juniors of Mamamoo. And artist of RBW"

"Most of the members did a superb job but Dosie and Jieun definitely need to work on their live singing ability, or else the company will further, cut down their lines"

"I suddenly remembered Mamamoo and IDLE's debut days YAS"

"I mean, the live vocals can already be heard clearly on the original mubank video, but this is further proof, it's so amazing to me how the vocal line managed to be stable throughout the song with that many singing lines while the dance wasn't compromised"

"The stability has me shook"

Here is a 'Period' performance from Purple K!SS debut showcase which is also highly praised in the comments section: