How to make MT_METALJETFUME followitem visible/invisible under certaincircumstances?s

I wanna know if there's a way to force the MT_METALJETFUME followitem to appear in certain situations in which it won't show normally (like the gliding ability) or disappear when it doesn't have to (like while digging in BattleMod)
But I want this to be character-specific, to prevent issues with anyone else

I don't know too much about the MobjThinker and FollowMobj Lua hooks, so... Can you guys help me with this little problem? c: