So Lancer traded in being a Servant for an Angel. Which means that he gets a lot of powers that he can't or doesn't want to use. But other than that, he'll just stick to his usual schedule of bumming around homeless, hanging around the forest or the river, greeting people at the train station, and hitting the bar. Also if someone infodumps him on the fact that he's now an Angel, he'll go brag to Kirei.