Leoichi and Leosagi are two completely different ships!! They are NOT the same!!
They are both Leonardo focused ships, yes, HOWEVER it's Leo being shipped with two separate characters.
"Leosagi" is Leonardo x Miyamoto Usagi
This ship mostly grew after the popularity of TMNT 2003 with Leo's close friendship with the character Miyamoto Usagi.
"Leoichi" is Leonardo x Yuichi Usagi
Yuichi is the main character of Netflix's show Samurai Rabbit: The Usagi Chronicles. He is the descendant of Miyamoto Usagi. Also unlike Usagi, Yuichi is NOT a TMNT character, he is from his own franchise entirely, but fans have been shipping him with both Rise Leo and 2012 Leo.
And the most important detail to know is...
Yuichi and Usagi are NOT the same character!!
So please if you’re making ship art or a fanfic of Leo with Yuichi and tag it as “Leosagi” that is the incorrect ship name and vice verse.
Hopefully this helps so people can know the difference and tags things more properly and not get non shippers and new Leosagi and Leoichi shippers confused, cause even I will admit it can get confusing.
After EMD Usagi ditches One to go back to Neo Edo, but One follows him wanting to help. Usagi’s still struggling with his mystic power/curse which really does not help with what he’s trying to do. Unfortunately Usagi is just as stubborn and self-sacrificial and One gets a taste of his own medicine.