Is it permissible to work as a "controller" for an Islamic channel by creating fictitious personalities and responding to oneself with different names to attract viewers?

"Tawriya" (allusion or double entendre) is permissible. It is when an ambiguous word is used, from which the listener understands something different from what the speaker intends. An example is saying, "from 'Abd al-Rahman," meaning "a servant of the Most Merciful," while the listener understands that your name is 'Abd al-Rahman. As for lying, it is forbidden and leads to wickedness and the Hellfire.