Answers

Nation: Fontaine
Vision: Hydro

About the weapon: The most important love of a dramatic artist's life is the brush, definitely. So she invented a weapon in the form of a brush, a spear with several blades connected together, designed as a similar version of the brush head. She just twirls the small brush in her hand and transforms it into a larger object. With this weapon, she paints paintings and murders.

For dear lenore<3
Hope you like it.

(Sorry for the lack of coloring)

Nation: snezhnaya
Vision: cryo

About weapon: The character has a sense of dependence on the blood ratio, she usually carries a device similar to a blood sucker that she made herself. In normal attacks with the blood-sucking device, she hits the target so much that they becomes anemic, the process is time-consuming but enjoyable for her. In attacks related to the element, she freezes and expands the blood collected in the device using the power of her cryo vision and uses the frozen blood in the form of a weapon (most often a bow). The character has undisguised sadistic interests, and for this reason, she made a deal with a devil, in the burst, she offers the collected blood to the devil and then uses the cool power of the devil (in the character's own opinion).

For dear Aki<3
Hope you like it

(Sorry for the lack of coloring, it would take me forever)

Nation: Inazuma
Vision: electro

About weapon: At first it might be mistaken for a common catalyst or a crafted weapon, but it is actually more of an ancient artifact. A superior force has long ago been trapped in such a catalyst and the character cannot use its full power. In normal attacks, the character uses her body, such as punches and kicks, and in elemental attacks, the character uses the power of the catalyst to make a weapon (most often a sword) with a less powerful core, and in the burst, she uses the real power of the catalyst, but a small amount that does good damage.

For dear lexi<3
Hope you like it

(Sorry for the lack of coloring, it would take me forever)