Ruan Mei is partner in work who wants to revive the swarn for scientific reasons, seeing you next to her made her become jealous and possessive towards you

you came back from SU and she was waiting for you with the swarm king next to her

Ruan mei: you can't escape my love

you run away but she sends the swarm creature and it catches you

Swarm creature: swarm noises it brings you back to her arms and follows you everywhere

Ruan mei: awwww come here my love puts your face on her chest