What is the ruling on creating a fake account in a girl's name to speak with a Christian girl with the intention of inviting her to Islam, and what is the ruling on assisting the expulsion of semen by hand during a wet dream in one's sleep?

The aforementioned behavior is not permissible Islamically, for it is following the footsteps of Satan, and speaking with non-mahram (definition) women unnecessarily opens the door to corruption, especially private conversations that can lead to major sins. Furthermore, assuming a girl's name involves deception, falsehood, and trickery. As for touching the penis, it is forbidden masturbation. Therefore, the fake page must be closed and communication cut off. The girl can be guided to beneficial Islamic pages.