Depending on your character's background, you could consider Effortless Lace
if, for instance, you come from a clan of giant hunters or something. While the item itself isn't "part of your character", it would certainly be something that a giant hunter would be very familiar with as part of their training.
The part of the item description I would want to draw your attention to is this:
If the weapon is wielded by a creature whose size matches that of the weapon's intended wielder, the weapon is treated as a light melee weapon when determining whether it can be used with Weapon Finesse, as well as with any feat, spell, or special weapon ability that can be used in conjunction with light weapons.
Because a scimitar is being wielded by a creature whose size matches that of the weapon's intended wielder, it would make the scimitar now count as a light weapon.
However, bear in mind the specific requirements listed there. It does say that it becomes treated as a light weapon for the sake of any feat that can be used in conjunction with light weapons. In my mind, this would mean things like Two-Weapon Fighting, which is what you're wanting from your description. This does not mean that the weapon actually becomes a light weapon, so be very careful with what other items and abilities you pick up that may be dependent on that.