Square Enix is starting to add crossover characters to Lord of Vermilion III. Since Ragna the Bloodedge was already in Lord of Vermilion II, Arc System Works lent Tsubaki and Rachel from Blazblue: Chrono Phantasma for Lord of Vermilion III.
They’re joined by Eren Yeager and Levi from Attack on Titan.
Lord of Vermilion III also has cameos from Star Ocean: Second Evolution characters Rena Lanford and Ashton Anchors.
Tama and Ulith from Selector Infected WIXOSS are also in Lord of Vermilion III.
Since Lord of Vermilion III is a card game so it’s fitting there are some Magic the Gathering crossover characters. Jace Beleren and Garruk are in the arcade game too.