Milling is usually represented in Magic lore as losing your thoughts/mind, so this represents her amnesia
Outro Final Fantasy has definitely left its mark on Modern, giving us a bunch of new trinkets to build around or slot into existing decks
Up and Away Creature (23) Backup Agent x3 Dreamshackle Geist Extraction Specialist Hullbreaker Horror Inspiring Overseer x3 Nebelgast Beguiler x2 Seven-Tail Mentor x3 Stormrider Spirit x2 Unholy Officiant x2 Welcoming Vampire Wretched Throng x4 Instant (7) Fading Hope x2 Kill Shot x2 Serpentine Ambush x3 Sorcery (1) Artifact (2) Brute Suit x2 Land (27) Island x11 Plains x12 Tranquil Cove x4 The Azorius deck from the same kit fairs a little better
The majority of Characters in Lorcana can either take a hit or deal a hit, not both, so while Cubby loses points for this being conditional, he still earns a spot on the list
Saga creatures enter the battlefield with a lore counter, and then they get a new lore counter before your first main phase
Being an Amber card, you have a lot of strong characters to choose from to fill this role: Mufasa, Betrayed Leader (how fitting), Hades, King Of Olympus, or Simba, Protective Cub (again, how fitting)