Just a minor mistake (Spoiler)

[Rubytyr]

In the .pdf that comes with the game, Hanako's bio explains it was her father that notably died in the fire, not her mother - as she herself says in the story (after she shown Hisao her full figure). I suspect both perished anyway - but all the same~

[Juno]

Her mother did not die in the fire but some time afterwards due to it, IIRC?