Owner Attributes lean more towards the mental end of the spectrum. They are the brains behind the toy, and their job is to come up with strategies and maneuvers to defeat their opponents.
>>Guts -- Measuring your courage, will, and BURNING SPIRIT, this stat generally governs how you act under pressure and what crazy moves you can pull. Important for Hero Types of course, and Rivals too.
>>Brains -- Not just general intelligence but how well educated, analytical and technically skilled you are. Brains helps formulate plans and strategies, and tweak and modify your Toy to best effect. Nerds love this of course.
>>Heart -- Your empathy, compassion, People Skills, Charisma and the like, this is important for friendship stuff and how you connect with your team- and your toy. Can overlap with Guts occasionally, but it's more about helping other people through things, and accepting help in return.
Attributes can be used to earn more techniques and abilities, but also for certain Skills, and in special cases, to boost rolls or something. The current idea is to have players earn new techniques every time they increase one of their three attributes.
Owners probably also need some skills to go with all of this. Tactics, Repair, Tuning, Technique, Knowledge, Intimidate, Boast, and such. Suggestions needed.