Neutral.
Character. Cost: 5. STR: 3.

Companion.

Stealth.

Challenges Action: Choose a character. Until the end of the phase, that character gains a icon and stealth. (Limit once per phase.)

"Just so."
Sebastian Ciaffaglione
The Road to Winterfell #37.

Link: Decklists

Syrio Forel
Reviews

Rules FAQ

The effects that grant an icon (e.g. Syrio's Training, Nymeria's second effect, Arya's ability) are all treated as adding "+1" icon. So if you had 0, you gain 1, you have 1. If you had 1 already, you gain 1, you're at 2 (which doesn't usually matter, most game things only check whether you have or do not have an icon). However, how this stacks with icon loss is where it matters. Icon loss is a -1.

So if you have Arya (0 mil icon) with a dupe (+1 mil icon), who then gets her mil icon stolen by Nymeria (-1), and then Syrio grants her an icon with Syrio's ability (+1), you have a net 0+1-1+1=1 mil icon.

If you have a Tyrion (0 mil icon) with a Syrio's training (+1 mil icon), and Caelotte takes away his mil icon (-1), he's back to having 0 mil icons.

Can we have a confirmation that Syrio can use his ability on himself, for example if he lost his icon due to attainted or Nymeria ? — Benji 321
I don't think this is ambiguous. If it was intended that Syrio couldn't choose himself, they would have printed as much. Instead they say "Choose a character" which has no restrictions. He can legally target himself or opponent's characters. Also, his granting of the keyword works the same way as the icons for purposes of (less common) keyword removal. — maneckn 2