Is there a danger to my client from maintaining a relationship with her corrupted channeler friend, and if so, is there a way to save her from extraterrestrial entanglement?

There is always risk involved when interacting with someone who is a person of interest and being corrupted in this way. Because there is an ongoing exchange of information and awareness, everything the friend sees and does will be recallable by the Arcturians interacting with her and enquiring through her deep subconscious all she is involved in, and so they will learn about her friends and their doings and take names. This is how they operate; they follow all the people who go on the Internet and sign up for newsletters from corrupted channelers. Those interested parties are self-identifying as an individual looking into forbidden topics; the general population has been subjugated to stifle interest in spirituality and in the paranormal so it is only those who are more a danger to the darkness still out and looking and seeking esoteric knowledge like channeled information. So the Extraterrestrial Alliance will want to know what people like your client are doing and will work to rein them in, so further contact has a liability associated. The best way to help her is indirectly through distance healing work with the LHP.