By this point, Angel had largely understood the meaning of Frost's words to Isabel.
"The apparition of the door will disappear, but that door itself should not vanish," Angel replied.
"That door? Do you mean the only one that doesn't have a matching pair?" Isabel looked at Angel with suspicion. "Why?"
"The other doors are just apparitions, and apparitions will surely disperse one day. As for that door, unless something unexpected happens, it should not be an apparition," Angel replied.
"If it's not an apparition, then what could it be?"
Angel didn't answer immediately but pondered for a moment before saying, "Regarding that door, I myself have some doubts. Once I have figured it out, I'll tell you right away."
Isabel looked intently at Angel before ultimately nodding, "Alright then."
Before leaving, Isabel said to Angel, "I have some matters I'd like to discuss with you, but now is not the time. I'll come to you next time."
