Rekki-Maru & Mekki-Maru

The Rekki-Maru (裂鬼丸) and Mekki-Maru (滅鬼丸) are Taki's (as well her new timeline counterpart's) signature weapons that appear in the Soulcalibur series where she is the featured character.

Rekki-Maru
Taki's original weapon from the first game, Soul Edge, and one of the few original weapons to have never been replaced in the following games. The games labels Rekkimaru as a ninjatō (a ninja sword). According to its Soulcalibur profile, Rekkimaru is Taki's preferred weapon. She made it herself and infused its blade with mystical powers.

Another Taki's Rekki-Maru had a shard of Soul Edge infused in its blade instead of Mekki-Maru, like her original counterpart, as this is to differentiate her from the latter.

Mekki-Maru
Taki's secondary weapon, added as part of her new dual-wielding style. Mekki-Maru is the lower blade on Taki's back. It is infused with a shard of Soul Edge that defines its sheer power, which explains Taki rarely uses Mekki-Maru in battle. Due to its power, this causes her to give away her position to her pursuers from the Fu-Ma clan.

During her first encounter and battle against Samus Aran/Kamen Rider Huntress, Mekki-Maru's magical properties were temporarily powered down when Huntress reprograms Taki's DNA via. This was later mitigated when it becomes drawn to the influence of the.

In Another Taki's case, since Rekki-Maru is imbued with a shard of the cursed sword, Mekki-Maru's properties are still similar to her original counterpart's.

Ryuseimaru

 * Main article: Ryuseimaru

Rekki-Maru & Mekki-Maru's evolved form is the Fu-Ma Twin Blade Ryuseimaru (封魔双生刃流星丸). This is used by Taki when she dons the GalaxyArmor, accessed by the Huntress, G7 Icarus XYZ, and G7 Type-S. The Ryuseimaru can be used as a pair of curved daggers or a combinable double-bladed weapon and harness Ridewatches to power-up attacks. Even after becoming a full-fledged Kamen Rider, Taki still uses the Ryuseimaru as a secondary weapon.