My-Th is still airing & still got one more Reiwa Rider to go after till the anniversary season. Which of these characters from Zero-One to Zeztz would you choose to bring back & guest star for 10th Reiwa rider's anniversary season?

And I feel for Legend & his faithful Butler should take part with the main cast (just Legend and Butler can pop up anytime). This way, Legend can be rival, ally & mentor to the new rider.

* Zero-One
   * Aruto
   * 02/Is
   * Vulcan (whether he's dead or alive)
   * Valkyrie
   * Thouser
   * MetsubouJinrai (whether Horobi, Naki, Jin, Ikazuchi or all of them)
   * Jun Fukuzoe & Shesta - if Shesta would get turned into a Magia by the Reiwa anniversary villain/rival
   * Rin
   * Ark-Zero
* Saber
   * Touma (if none of them return but him, he'll go Xross Saber using all their swords)
   * Blades
   * Espada
   * Mei Sudo
   * Buster
   * Kenzan
   * Slash - perhaps a succcessor of Daishinji this time? Female maybe?
   * Calibur
   * Saikou
   * Sabela
   * Durendal
   * Desast
* Revice
   * Igarashi: Revice (Revi & Vice), EvilytyLive (Live & Evil), Jeanne & Lovekov or all the siblings?
   * Aguilera
   * Demons - Hiromi or successor?
   * Koshiro Igarashi - as a little kid? Perhaps a future self appearing as the new Demons? 
   * Destream & Vail?
   * Yukimi Igarashi
   * (Get) Over Demons/Julio
   * Hikaru Ushijima - if there's any redemption for him as a new rider or have his actor play a different character
   * Orteca
   * Juuga
* Geats
   * Ace
   * Tycoon
   * Na-Go
   * Buffa
   * PunkJack
   * Tsumuri
   * Hakubi
   * Nadge-Sparrow
   * Ziin/Ziingazer
   * Kyuun - can he become KyuunGlare?
* Gotchard
   * Houtaro
   * Majade
   * Valvarad
   * Wind
   * Lachesis - if there's any hope to bring her back or have her actress be someone else?
   * Minato
   * Kyoka Edami
   * Renge Icho
   * Sabimaru Tsuruhara
   * Dread
   * Ryo Kajiki - whether him or go Butler full-time?
* Gavv - humans & Granutes need coexistence
   * Shoma
   * Valen
   * Vram
   * Sachika Amane
   * Lizel Jaldak
   * Masaru Inoue
   * Bitter Gavv
   * Bake
* Zeztz - from CODE to ZEZTZ
   * Baku
   * Nox
   * Dawn
   * Nem
   * Lord Seventeen
   * Tetsuya Fujimi
   * Nasuka Nagumo
   * Eight - will she become Lord Eight?

Whoever you all choose from each season, explain why?

Choose characters (so far) to guest star for 10th Reiwa Rider's anniversary season! Which are best? (BONUS: Legend & Butler should be part of main cast)