Labyrinth of Touhou Tri (Demo v0105): Yakumo Ran, Protector of Paradise
There was a small update between this video and the previous ones, though I don't think there were any balance changes, only QoL and translation/bugfixes.
Ran starts things off by summoning her shikigami and buffing their offenses, after that, she can resummon them when they're wiped out and otherwise attacks using various magical skills and debuffs you. She also has HP-gated moves which take priority over her summoning and regular attacks.
Here I damage rush her down with Patchy, with Renko/Keine buffing, Aya speeding Patchy up, Cirno to debuff her SPD, and Reimu increasing damage against Youkai. Ran is immediately dropped under 80% so her second move after summoning will always be Princess Tenko, it has a high multiplier but low piercing, so chars like Keine or Koishi with full MND investment can take it without too much issue. By her next turn she is already under 60% so she Focuses and then uses Descent of Izuna Gongen, which is almost guaranteed to oneshot whoever is in the leftmost slot; between Focusing and the delay of Izuna Gongen itself, Patchy has enough time to finish her off before she takes another move.
(On Aya's last turn, I missclicked and had her use Advent on herself instead of Patchy.)