Character planning

So I need some lengthy descriptions to answer a simple question. What are you and/or your character(s)'s greatest fear? Also, give a small description of what a manifestation of this fear would look like (humanoid). ^-^ This would help me out alot, thanks ahead of time for all responses.

Out of my three characters, only one of them holds fear in his heart. If you want humanoid personifications of fear, I can elaborate on Alexander's four biggest fears for you.

The first fear is his former friend, Jericho Vee Trieu. Jericho vanished for a period of months around a time Alexander's love Tarsi had fallen ill. When he returned he was a monster that destroyed Alexander's home city in a course of hours. Jericho is sadistic, brutal, and beyond fighting. Sarcastic and twisted, Jericho is a force beyond nature and just below Gods. This is Alexander's first fear.

Alexander's second fear is one of the ones he hasn't discovered quite yet, but relates directly to his weapon: Clarent. Alexander fears that Clarent will be able to assume total control over him eventually and twist him into a mere shell of his former persona. This fear drives him to having insomnia most nights, as he forces himself to be constantly aware of Clarent's influence.

The third fear is one that he has already dealt with, but now faces again: Loses Tarsi. Alexander could not bear to lose her again.

The forth fear is that he will succumb to his true nature. Alexander knows on some baser level that he lacks a soul. His fear is that like the other multitudes of Dis-sentient that Jericho has created. Alexander does not understand why he, Tarsi and Jericho have remained human in body, but fears he will decay into a vaguely humanoid echo of himself and become a monster.

That covers it for now. Have fun.