So far, the "Shiranui" monsters have effects that basically revolve around providing card advantage when they are banished.
The non-Tuner Main Deck monsters have a set of two very versatile effects: the first one ranges from the set-up of Synchro/Xyz Summons to a boost on offensiveness; the second one triggers when they are banished and ranges from card retrieving to card destruction.
"Cursed Katana Shiranui" is currently the only Tuner of the Archetype and allows the player to Special Summon a Zombie-Type Synchro Monster from the Extra Deck, by banishing itself alongside with a non-Tuner Zombie-Type monster, both from the Graveyard.
There are currently 2 boss monsters in the Archetype, both of them being Synchro Monsters: "Katanagami - Shiranui" and "Ikusagami - Shiranui". The first one can recycle one of your banished "Shiranui" monsters and then restrain the opponent's aggression; if it end up being banished, it can weaken one opposing monster's ATK by 500 points. "Ikusagami" has higher stats and a more straightforward set of effects: when it is Special Summoned by any means, it can banish one Zombie-Type monster from the Graveyard in order to raise its 3000 base ATK by an amount equal to the banished monster's ATK; this effect is obviously more powerful when its target is a "Shiranui" monster, that will have its second effect triggered. When it is destroyed, its owner can return one of their banished Zombies with 0 DEF to the Graveyard.
The two on-theme support cards the Archetype has so far are also very flexible as they can revive fallen monsters, recycle the banished "Shiranui" and destroy cards: "Shiranui Style: Reincarnation Formation" can either revive a Zombie or replenish the Graveyard with one of the banished Zombies. "Shiranui Style: Swallow Sword" acts exactly the same way as "Icarus Attack", with the difference that it banishes a "Shiranui" from the Deck at the resolution, which can trigger its effect.
Being a Zombie-reliant Deck, there are many generic support cards that can be very useful, such as "Zombie World", "Zombie Master", "Book of Life", "Pyramid Turtle" and "Uni-Zombie". Also, the signature mechanic of the Archetype can also be supported by cards like "Gold Sarcophagus", "Spirit of Flames" and especially "Shutendoji".