Skullgirls vs Under Night In-Birth

Connection:

Both are female video game characters that are centuries old women trapped in the bodies of young girls due to a curse that made them immortal (The Skull Heart granted Annie's mother's wish for Annie to become a child forever, whereas Night Blade experimented on Linne that gave her the ability to transfer her consciousness to another girl's body should her host body be killed)

Both seek to end their curse (Annie wanting to destroy the Skull Heart to end her immortality and Linne seeks the legendary sword called the Indulgence of Insulation that can kill her)

Both wield broadswords in battle

Both are cynical and jaded from their experiences

Both have a small cutesy mascot companion that stays by their side at all times (Sagan and Kuu respectively)

Both play a mentor-like role to an idiot hero (Beowulf and Hyde respectively)