Allen Ridgeley

Allen Ridgeley is a guest character in the Xenosaga series.

Appearance and personality
A timid and wary person, always wearing his Vector uniform and following Chief Shion Uzuki around with KOS-MOS. A genius who graduated top of his class from the most prestigious university in the galaxy, he uses his mental prowess to keep Shion out of trouble and repair KOS-MOS when necessary. He has fallen head over heels for Shion, to the point where he appears as a ghost in a picture of her. He will do anything it takes to protect Shion, even if he doesn't express his feelings very well.

History
Allen is Vice Chief Engineer of the KOS-MOS development project at Vector Industries First R&D Division. Joined Vector's First R&D Division in T.C. 4764 after graduating from the University of Bormeo. While two years older than Chief Shion Uzuki, he is one year her junior at Vector. He cares for Shion, but due to past events concerning Shion and her former love Kevin Winnicot and his own personal insecurities regarding Kevin, he does not often express his thoughts and emotions. Comes from a wealthy family, but doesn't share details of his background with anyone. His hobby is fishing. Allen writes down his thoughts towards Shion in a journal along with information he catches that comes from her as a way to try and understand her.

Episode I
Allen is stationed onboard the Woglinde and assists Shion with KOS-MOS's development. He is concerned about how aggressive Shion can be at times and needs to pull her out of a simulation she uses to test KOS-MOS. Allen wants to ask Shion out on a date, a fact that is known to his coworkers, but is too nervous to do so. When the gnosis attack the Woglinde, he is rescued along with the other Vector employees by KOS-MOS, and the two then go and catch up with Shion. Allen is able to flee on the escape pod with Shion and the two are eventually found by the Elsa. Shion threatens to kill both herself and Allen if KOS-MOS doesn't cease her desire for the Elsa to leave them there to be picked up by someone else. After boarding the Elsa Allen befriends the crewmembers. He reports back into headquarters along with Shion and is dismayed when he realizes no one noticed he was missing. Allen remains on the Elsa along with Shion and assists her throughout the remainder of the game.

Episode II
Allen has a rather awkward beginning to the game, accidentally destroying Shion's glasses then claiming the stuff she does puts him on edge right in front of her. He accompanies Shion and KOS-MOS to the Vector division on Second Miltia where they are shown the KOS-MOS Tertiary Weapon System. Afterwards Allen tells Shion she's acting strange today as she heads to the city. She tells Allen to keep an eye on KOS-MOS before she goes. Allen later tells her it will be a few days for them to work on the weapon system. Allen and Shion are asked to help by Helmer after the attempt to access the Y-Data from MOMO is unsuccessful and MOMO tries to destroy her mind in order to prevent Albedo from accessing it. He assists Shion and the others with diving into MOMO's subconscious domain.

After Albedo accesses the Y-Data and opens up the path to Old Miltia, Allen returns to the Dämmerung along with Shion. When Shion steals the Dinah and escapes, Allen accompanies her, although he is quite nervous throughout the attempt. Allen joins the Elsa along with Shion and KOS-MOS and stays on board when they head to Old Miltia and then to the Omega System. At the end of the game an exhausted Allen says he wants to take a long vacation, but Miyuki says he has to file a lot of reports first.