Willow’s character then returns to a sense of normality, as she reclaims her space in the Scoobie Gang; but with one important difference: any spells she now casts are primarily to assist Buffy (either directly or indirectly). Willow proves her worth to the Scoobie Gang, as they start to battle against “The First”; which unlike anything they have fought before, is actually “the reason that evil exists”.
An early test for Willow’s reformed character occurs when she talks with Cassie (a young lady they helped in the past); only Cassie is now actually dead, and claims to have a message from Tara (who is also dead). Although Willow becomes emotional in the encounter, she also passes the test: being able to directly face the fact that Tara is dead (without going off the rails). Shortly after, Willow realises that she actually encountered The First, which as it turns out, is able to masquerade as anybody that’s dead. Willow’s reformed character then faces another test, when she attempts to locate The First: her spell goes wrong (as The First corrupts it), and Willow ends up channelling the evil energies of The First (even hitting Buffy with a powerful magical blast). Fortunately, Xander is at hand, who destroys a bowl on Willow’s altar (thus breaking Willow’s channelling of The First). As a result of this (and some common sense), Willow realises that she needs to avoid taking on The First directly: she decides to refrain from magic for a while; and concentrate on increasing her level of self control (in case The First attempts to exploit it again).