face= ENFj. He's not bold and adventurous. I can imagine him saying, "be careful around the pretty face when you have that nasty-looking metal thing in your hand..."
Also, I kinda remember him telling BA to chill and to stop picking on Murdoch. Opposes the ISTp to take sides with INFp. Makes sense.

EDIT:
Erkki's opinions - BA ISFj. It could actually work! Face ESFj. Might be even more accurate than ENFj, especially because I've never really liked his easygoing attitude.