EDIT: [LOCKED TO THE TARDIS CREW MINUS KOU. HEY, THEY ALL KNOW ALREADY.]
Best of luck to Alexander-san in the OR.
[LOCKED TO: THE AKIYAMA-IZUMIS EXCEPT KOU AND SHIO, TARDIS CREW, ADVENTURE CHOSEN, JAPANESE TAMERS!TAMERS, DATS COMMANDERS, UNIT 2, AND TOUMA, TEAM W.I.T.C.H., ROSE, HARRY, AND THE NEW GUARDIANS]
Facts:
Koushirou is missing; his D-Comm is untraceable
Whoever has him has only ever spoken to Ryo, both on the initial post of fake error messages and on Ryo's unlocked posts or those just locked to the TARDIS crew ( 1, 2, 3)
Someone enjoys gloating
Ryo, Aveline, and Molly-chan swear up and down it's definitely Koushirou's voice in the voice messages; it certainly does sound like him
Mysteries:
Who?
Why Koushirou?
Why are they only contacting Ryo?
Why let Koushirou talk to him at all?
How far to trust 'Koushirou'?
Vadermon = no emotion yet he sounded like he was in pain ( Kleinwillinghoeffer-san's testimony)
Injuries listed should have Koushirou in shock at least ( Shishioh-san's thoughts)
Talking in circles - why? (the Doctor thinking on the 'Comms)
Who likes word puzzles? I must admit; the fact that we're most likely working from English here is giving me problems (EDIT: going by the Doctor's conclusion that it's Jeremy, and that it doesn't work in Japanese or French)
Possibilities:
Vadermon has him (motivation: sales? revenge?)
Jeremy has him (motivation: revenge?)
Vadermon and Jeremy are working together? (???)
PROFIT.
[Attached are annotated copies of the linked conversations.]
(OOC: That last bit is Keramon, and Osamu had more important things to deal with than locking it properly.)