These two wolf girls are siblings. Woundei, The big sumo one and older sister. and Woufei, the normal and younger one.

Woundei Info:
Woundei is the stronger & bigger one and the most serious one. Woundei hated her appearance at first, But when she met "the big sumo animals" she understood their indifferent nature and excepted her appearance and powers along with the boys as her friends and allies.

Woufei Info:
Woufei is the slim, shorter and hyperactive one. Woufei can be very bossy and spoiled when things don't go her way or doesn't get what she wants & get very sassy. That is why her older sister,Woundei ,Must look after her because of her childish hyperactive behavior. and she can get jealous of her sister because of her massive sumo body and strength, but she has some strength of her own that she shows at times.