Rachnera Arachnera (ラクネラ・アラクネラ, Rakunera Arakunera) is an Arachne and the sixth girl to move in with Kimihito and fifth girl to officially do so. Due to their fear of her, her original host family had sold her off to Kasegi, who used her and her webbing to make money. This, along with his cruel behavior left her with a deep hatred for humans. This behaviour changed after she abducted Kurusu and found out that he was a decent person who didn't discriminate against non-humans. Since then, Rachnera has been flirting with Kurusu while facing her fellow monster girls in the house, especially Miia and Centorea Shianus who see her as their love rival for Kurusu.

Daily Life With A Monster Girl Wiki

Here's The Voice Reference: https://youtu.be/BA4eEjuS_1E?t=40

Sorry, there is not much in the reference footage, sometimes it's hard to get footage from it since streaming services block recording softwares. Hope this video I found will help though.