- "There's a quality to Breanna's style I prefer."
- —Clarissa to a fellow witch at the Conservatory
During the time when Emily Kaldwin or Corvo Attano goes to the Royal Conservatory to deal with Breanna Ashworth and the Oraculum, Clarissa is one of several witches tasked with guarding the museum. She is patrolling the Main Hall. She can be heard talking with her sister asking if she tells Breanna to make a effigy of her. The other witch asks like a skin and bones representing from the Oracular Order. She agrees and says that she'll keep it in her Chambers the other witch tells by her name "You have bizarre tastes, my dear Clarissa". The witch says she like to see herself like that instead she should have a portrait of herself painted by Delilah. Clarissa there's also a quality in Breanna's style that she likes and tells her that it is touched by something deep down in the mud, where there's no light. "The endless womb and the cold, dead grave, both the same. The witch says that Breanna's effigies reaches to her mind and into the heart". She asks Clarissa wouldn't she be afraid it could influence her dreams like the Sisters of the Abbey. Clarissa says to her that part is the thrilled one. Clarissa and the other witch starts patrolling the Hall.
- Clarissa name is mentioned by a fellow witch who is guarding the Main Hall with Her.
- Clarissa likes Breanna and her works more than Delilah.