[The Long eared bat]

I also vote Dienekes. Claimed to be the bravest Greek to fight at
Battle of Thermopylae

I don't think Tether of Logos (ToL) will be that effective. It will be difficult to keep up with your figures and for ToL to be used most of the time Gideon needs to be adjacent to his own figure to move an enemy figure away. When a figure wants to engage him after moving, ToL is beneficial to them.

An alternative ability using the same name (ToL) which is very defensive based:
When [name] is attacked by a normal attack from an opponent's adjacent figure, before defense dice are rolled, you may roll the 20-sided die. If you roll [X] or higher, [name] rolls an additional defence die for each blank rolled by the attacking figure.
This would go well with combat challenge.