Pre-battle settings
If you don't already have a sworn ally enter a province and request for one. If a merchant is in town purchase reinforcements as well! You can boost your bond with two characters this way.
Equip the fastest horse you have, preferably the Red hare. To get the Red hare you must complete the Battle for Supremacy stage.
Equip the Congeniality seal for both your primary and secondary weapon. The seals stack with one another. I didn't realize I only equipped Congeniality for my secondary weapon, therefore I only got half a bar. You can get a 1 full bar by equipping seals for both weapons.
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Select the stage Nanzhong Solo Battle on Easy. The gameplay must be set to a minimum difficulty of Easy in order to get a full bar. Start by heading North and defeating the enemy commander. That's it! Your bond will increase when you finish the stage.
*For some odd reason my bond didn't increase with Yue Ying. Usually you can just finish the stage without waiting for your reinforcement to arrive and you will still get the increase.
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