A model is Surprised if an Activating Enemy model that did not begin its activation in BtB, performs an action that Targets it or brings it into BtB and that Enemy model started outside of LoS and remains outside of LoS during Movement.
Surprised models may not declare Ki Feats or Ki Boosts, are always the Attacker second in Melee Exchanges, may not benefit from traits or effects that affect Initiative and suffer a -1 Melee Pool modifier.
They may still declare Special Abilities (Attacks and Defences).
Models are only Surprised until the action in which they became Surprised is resolved.
Effects which are not Ki Feats may still be used.