In the new section of letters are Ә, Ғ, Қ, Ң, Ө, Ұ, Ү, Һ, and І.
Ә would be a lighter Е, due to Ә looking like an upside-down lowercase Е, and he will now be the letter wounded instead of В.
Ғ is made out of wood, and he uses his middle line as a bat, he only used it when the other letters were beating up Д, He was never seen using it as an adult in his own episode.
И would be light turquoise now, and also gets peace.
Қ is a non-bug version of К with a single leg, and that's it.
Ң would have the same role as Н, but he is not the protagonist. (and Н isn't the main protagonist, but a supporting character)
Ө's role is like O, and is one of the bullies, along with Л.
Ұ acts like a helicopter.
Ү's role is similar to У, because У is shaped like a lowercase Y, and Ү is shaped like an uppercase Y.
Һ's role is like E, except he will not get captured by Д.
І's role is in his own episode, Д would run next to him, І fires a plasma cannonball at Д, but Д dodges it, by running away, and Ъ, Ы, and Ь would see the cannonball coming towards them and vaporizes them.
And Р is the protagonist, and he is different from Р from the Р from Brendan's Russian Alphabet Lore.
Credit to bren319.