Mino is a blade summon controlled by the blade master (Tetsu/ Tetra Yushi). Originally summoned to take on the overly strong school bully Thad (aka Thug). But after he is created in a summon of Mai and Ino his programing to be a justice minded gets out of hand and causes the group trouble and eventually Tetsu has to take up the Demon Blade to halt his attacks on the school and himself. Once he joins Mino plays a supporting role in fighting with his super strength and low level elemental milk blasts (a water based elemental attack).

Mino being summoned

Creator Notes:
When I created Mino in my mind I wanted a cow-like creature that is similar to a cartoon mascot for dairy products running around. So when I designed it I looked at several dairy mascots and blended it with the look of One Piece’s Chopper.

2013 Mino’s Introduction (and Moonspin and Carol Salters.)

Creating the personality I wanted the version from when he is summoned to when he becomes a blade summon to be a bit different. So before he becomes a summon, his obsession of justice being out of hand was intentional. Given I never really plan to drop his hero worship as I liked the idea of distorting the original story of the Beast of Minos to have a Minotaur the worships and geeks out over heroes to be a pretty funny. Later after he becomes a summon I have him take on a more Yakuza / Rebellious follower of Tetsu.  

Mino is always interesting to write, I try to shove in as many cow-based puns as I can with him making it part of his quirk to always talk in wordplay.  

Mino is often the one summon I struggle to fit in while he is mostly a physical fighter his few water (milk) based attacks help Tetsu out early when Mai cant/ won’t fight. But on a power level he tends to be weaker more so when characters like Lori and another come out. So as I write this I am still trying to figure out where to take Mino to grow stronger as a summon.

Mino and Hachi often work as a team throughout the series.
A quick sketch that built up his current design