You are
Doc,
town-aligned unicyclist.
Evil Twin: The first time you would be killed, your brother is mistakenly killed in your place (1x bulletproof).
Glorious Jawline: Once per game, during the night, you may show another player your glorious jaw. Roleblock that player.
Your servant is
Berserker (Florence Nightingale)
You summoned Nightingale using the fact that you could be mistaken for a doctor as a catalyst.
Medical Emergency: Once per night, your servant may give medical attention to another player. If that player would be killed, they are instead protected. If they are poisoned, any poison is removed. If this is the only ability that targeted that player tonight, kill them instead of protecting them.