On the AC7 japanese website, I used Google Translate and cleared up some translation errors. Here's what it says in English.
"Trigger:
A pilot of the Osean Air Defense Force. Dispatched to the Fort Grays base as a member of the International Union Peacekeeping Force. His personal mark is a wolf with a revolver. A certain incident triggered him to be sent to a penal unit."
That's my best guess as to the translation. The original google translate gave me something like:
"A pilot of the Oceania Air Defense Force. Dispatched to the Fort Grace base as a member of the International Ceasefire Monitoring Force. The personal mark is a wolf with a revolver. A certain incident triggered him to be sent to a punishment unit."
CONCLUSION: It's a wolf.