Gender: Male Location: home, playing Guilty Gear Xrd.
I hope he's still alive too.
That said, hmm, tough one. While Merlin's magic is now officially OP thanks to her Infinity ability, Estarossa could still probably dodge whatever she throws at him since his physical ability is far above hers and Galan's (who was able to dodge her teleportation spell with ease).
That also said, his commandment is useless since she's bound to feel scientific intrigue rather than hatred towards him and his Full Counter is useless since it only reflects physical attacks.