who’s the girl? I don’t remember reading abt her on the spoiler forum

The red-haired girl from the church? She's another El fan. As I recall, her job was to accompany El and maintain his health (before he was cursed), which is why she started traveling all over to look for him after he disappeared.

She returns after his curse is released (because she's basically the Saintess of the Hero's Party), but she's not very important to the story, so it's not surprising you don't know her.