Buffy Summers

1996: Called as the Slayer, gained her powers, battle & defeated Lothos;
Initially, a reluctant hero who constantly wished for nothing more than a normal life
1997: Drown in a pool of water by the Master, revived by Xander using CPR, defeated the Master
1998: Battled & defeated Spike, Drusilla & later Angelus
1999: Battled & defeated Mayor Richard Wilkins
2000: Battled & defeated Adam, a bio-mechanical demonoid
2001: Battled & defeated Glorificus, a powerful goddess from a hell dimension;
Lost her mother to an aneurysm, sacrificed herself to save Dawn & close a portal
Resurrected inside her grave, had to dig herself out
2002: Battled & defeated Warren, Jonathan, Andrew, & Willow who turned dark on Magic
2003: Battled the First Evil, survived the Battle at the Hellmouth;
Dedicated herself to gathering & training all the recently activated Slayers