Maka from Soul Eater makes a reference to the Manga Ending in the Fire Force Mobile game! : r/firebrigade

Which character from Fire Force is your favorite? - Quora

Soul Eater, Fire Force Wiki

How Fire Force and Soul Eater Are ACTUALLY Connected

Fire Force, Soul Eater Wiki

but you're burning up, too — Soul Eater character cameos in Fire Force

New Fire Force x Soul Eater official illustrations from the mobile game collab!! : r/firebrigade

Is fire force and soul eater the same world? : r/firebrigade

Fire force and soul eater connections : r/firebrigade

How Are Fire Force and Soul Eater Connected?

Fire Force X Soul Eater : r/firebrigade

Fire Force / Characters - TV Tropes