Name: Ren Age: 22 Height: 178cm

Wears a cloak and gas mask when going outside. Suffers coughing fits if he goes out without the gas mask.

In Romance: Yandere. He cannot bear to lose his loved one, and that person becomes his sole reason for living. He is an unconscious yandere.

Name: Alba Age: 31 Height: 186cm

Has a resistance to spores, so he can go outside without a mask. Former doctor.

Manager of the base, a derelict hotel (The Albatross).

In Romance: Kuudere. He shows little emotion but is gentle with the person he loves. When alone together, he becomes incredibly doting and affectionate.

Name: Sora Age: 25 Height: 173cm

Has a resistance to spores, so he can go outside without a mask.

Former mail carrier. He still delivers the letters that Ren scavenges.

In Romance: Doting. He is not possessive. When alone together, his energy becomes calmer than usual, and he reveals his true feelings and vulnerabilities when he lets his guard down.

Name: Towa Age: Unknown (approx. 24–26) Height: 182cm

Conductor's uniform. Has a resistance to spores, so he can go outside without a mask.

Former conductor. He still keeps an old locomotive running.

In Romance: Tsundere. Basically gives the cold shoulder but shows affection through actions rather than words. He won't say it when he's jealous; he just gets moody.