Inspired by the main cast of Mlp and Equestria Girls, here are some weapons that reflected the nature of the mane seven and the rainbooms.

Weapon's description:
Twilight: Dawn's sword: enhance magic abilities, can cut anything even space itself.
Sunset: Summer tiara: enhance psychic potential, get pyrokinesis.
Applejack: Fists of truth: physical strength 1000_{, physical resistance 500}.
Rainbow Dash: Rainbow lightning spear: speed 1000_{, agility 500}, spear can make lightnings.
Flutteshy: Nature's gift: heal capacity, summon animals of all type.
Rarity: Maiden beauty: creation of crystals, shields, mirrors, force fields, projectiles.
Pinkie Pie: Omega party cannon: shots explosive party stuff, 5 gun forms!!