Next to captain, there was another human introduced in KF3, Calenda. She natively speaks english and can be seen doing so in-game as well as in promotional videos. The game actually had japanese subtitles for her dialogue for those that could not speak english.
In september 2019, SEGA released Kemono Friends 3. A mobile turn based gacha rpg and successor and sort of sequel to the original 2015 mobile game. This game focuses on an Expedition Team feature several friends including Dhole, Meerkat and Short-beaked common dolphin.
The player insert for this game, Captain, doesn't actually have any confirmed gender. You can find fanart of both captains going any direction. Another thing you might rarily find is that fans sometimes compare the left (eyebrows captain) to Shizuku from IM@S
There seems to be a staggering increase in interest in "horse girl". They're everywhere! Even in Kemono Friends!
Originally designed for a collab with the JRA, they joined the wide array of animals available as Friends within Japari Park!