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"My Lord, it seems the woman named Charlotte has a daughter. She said she'll pay us good for rescuing her daughter. But what should I do if I find her converted into a Demon Spawn?" Eleanora spoke to Blake in the middle of his battle. However, Blake's incredibly fast thought process immediately generated an answer to her, which was delivered promptly through the telepathy ability that a master had with their spirits.
"Do the same with the butlers, break her legs and arms and knock her out. As long as she's alive she can be healed. This family is rich, they might pay us well if they ask me to heal her afterwards. If she's not a demon, bring her to her mother obviously. …However, if you happen to find Cassandra's son, try to assess the situation, and immediately contact me again. That kid is someone I am quite interested in, and his future seems grim if his mother is defeated today…"
Check "The Protagnist's Sister Is Actually the Strongest"!