Mike & Kel the Siamese twins
Mike and Kel take up two squares vertically or horizontally. They rotate 90 degrees clockwise or anticlockwise, and cannot rotate through a wall. They cannot fit through tight diagonal spaces.
Special With 10 (or less) Food, the Siamese twins can split into two players - once split the gameplayer will move TWO spaces in any direction, leaving one body half on the square they split from, and one on the new square. After that, if the gameplayer makes a move both characters will make this move. This will allow the twins to move through passages they previously couldnt. If you push against a wall with one character and the other is free then that will alter the gap with the characters. If you had a set distance they could be apart eg 4 squares, then you might be able to set some interesting challenges. Especially if the characters die if they get too far apart...
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..K....
..M....
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Vertical
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..K....
..M....
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Horizontal
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..K....
.......
...M...
After a split...
..K....
.......
...M...
.......
Player presses up one after a split
Monsters will target Mike when aiming direction. This could be worked into the story and scroll texts. When split into two players, there will be no bias unless the distance from a monster is equal - in which case they will go for MIke. Apparently he tastes better.
A special twin splitter tile could also be made available where if the twins move fully onto the splitter they become two. (With Mike being the character that moves twice).
If Arrowballs try to push the twins in different directions eg:
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.>M..
..K<.
.....
It will be fatal.