In this context ヮロス is used as an short expression meaning "LOL" or "laughable". "Yes yes, ha ha" is the closest I could think of without overdoing it.
I'm not sure, isn't something like ワロスワロス an Internet slang that you wouldn't really say in real life like "LOLOLOL"? I don't know, I don't live in Japan.
Count 30 secondsThe chapter of hide and seekOk, Sakuya is it!!Well done, mistress!!You're both embarrassing.Can I go now?Yes yes, ha ha
"ワロス” is a general expression meaning "laughable" or "LOL"Sakuya!! Hide and seek!!One, two, three...Not yet, hehehe♥