#1
Various! Sonic Underground Series...by CasonArtSweet
Meet Princess Kadence the Hedgehog or "Kade" for short, the eldest sibling of her triplet siblings Sonic, Sonia, and Manic. When the evil Dr. Robotnik took ove...
#2
Sonic Underground Series x Older S...by RainbowCart
Join Sonic the Hedgehog, his triplet siblings, Sonia and Manic, and their eldest sister, Sophia, as they journey all throughout Mobius in search of their missing mother...