Continue the search for a good fountain pen for drawing, I introduce you to Tachikawa Comic pen School G nib(Manga pen F nib if you buy them in Japan, becareful not to mistake with extra fine (EF) nib) and compare it to Nakimi Falcon
https://www.jetpens.com/Tachikawa-Comic-Nib-Fountain-Pen-School-G-Model-Nib-Fine-Black-Ink/pd/4577
>Pros:
More flexible than Falcon, of course this is Tachikawa, their nibs are the best for drawing
Cheaper, only 1/20 the price of Nakimi falcon
Their ink cartridge is very good, no feathering, water proof.
Probably the best fountain pen designed with drawing in mind.
>Cons
Don't have fashion value and can't last a life time like Nakimi Falcon(I'm not sure about this since my friend had one for 8 years and it's still as good as new as he clean it regularly, mine just bought recently), Not much of a treasure if you want to give your grandkid a memento.
Ink cartridge will dry uf you don't use it often, unplug and clean if you don't draw for a week or more, or you can refill the ink cartridge with Pilot ink.