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Description
they use Fusion Crystals to fuse, they are mortal enemies. For special reasons, they cannot untie the collars and tethers that connect each other

Z.o
Zangoose
gender: M
He and U.o are sworn enemies. He has an impatient and stubborn personality and can tolerate being with people he doesn't like, but as soon as he starts a conversation, it will lead to non-stop quarrels and fights
He is blind in his left eye, an injury caused by U.o

U.o
Seviper
gender: M
He and Z.o are sworn enemies. He has an impatient and stubborn personality and can tolerate being with people he doesn't like, but as soon as he starts a conversation, it will lead to non-stop quarrels and fights
He is blind in his right eye, an injury caused by Z.o

O.s
fusion of Z.o and U.o
gender: M
He is different from Z.o and U.o. He is unusually silent and calm, completely unlike the two of them. However, this is because he is resisting his own thoughts. Z.o is too similar to U.o, so he doesn't know whose thoughts are leading, so Just deny it completely
This fusion is difficult to form, but since the two of them are almost identical, it is easy to fuse unwillingly. Once fused, O.s will not have the idea of actively canceling the fusion, and will maintain it until exhaustion. For him, as long as he Still existing is equivalent to defeating the old enemy (Z.o/U.o)
He is blind, but has excellent touch and infrared perception. He is very lucky that he does not need to see his own appearance. When he decides to act, he will drag his tether to force himself to move, just like pulling each other before fusion

Description
they use Fusion Crystals to fuse, they are mortal enemies. For special reasons, they cannot untie the collars and tethers that connect each other

Z.o
Zangoose
gender: M
He and U.o are sworn enemies. He has an impatient and stubborn personality and can tolerate being with people he doesn't like, but as soon as he starts a conversation, it will lead to non-stop quarrels and fights
He is blind in his left eye, an injury caused by U.o

U.o
Seviper
gender: M
He and Z.o are sworn enemies. He has an impatient and stubborn personality and can tolerate being with people he doesn't like, but as soon as he starts a conversation, it will lead to non-stop quarrels and fights
He is blind in his right eye, an injury caused by Z.o

O.s
fusion of Z.o and U.o
gender: M
He is different from Z.o and U.o. He is unusually silent and calm, completely unlike the two of them. However, this is because he is resisting his own thoughts. Z.o is too similar to U.o, so he doesn't know whose thoughts are leading, so Just deny it completely
This fusion is difficult to form, but since the two of them are almost identical, it is easy to fuse unwillingly. Once fused, O.s will not have the idea of actively canceling the fusion, and will maintain it until exhaustion. For him, as long as he Still existing is equivalent to defeating the old enemy (Z.o/U.o)
He is blind, but has excellent touch and infrared perception. He is very lucky that he does not need to see his own appearance. When he decides to act, he will drag his tether to force himself to move, just like pulling each other before fusion