These rules are intended for if a player is controlling an animal that will be around a while, or if a character has a pet/companion that they can take with them on missions. Though generally for non sentient animals, sentient animals can fall under these rules too, depending on how mentally developed they are.
Generally speaking an animal plays the same statistically as a a humanoid, but the major change is in advancement and development of the character. Because unlike humans animals are not as prone to adaptation, animals do not gain things freely like humans do at certain levels, in fact, animals do not have levels at all, they are measured by their 'Aptitude' or APT for short. APT is the measure of 'growth' for an animal and instead of EXP AP and SP they just earn a single APT value at the end of missions. Improving everything has an APT cost that's a simple and direct charge to increase a value.
*+1Stat point: Pay 1/10(rounded down) the cost of the value you're stat is currently at. [If you have 29POW and you're improving to 30 you pay 2 APT]
*Skill level: Follow the same rules as normal skills, however, every 5 points in SP is 3APT
*Passive: A single passive is 15 APT
*Ability: An Ability cost 15 for level 1 and then 5 more cost per level(So a level 2 cost 15+20[35] in total.
Creating a new Animal
Well animals and pets are not intended to start out as powerful as humans of course, their value is in the fact that they can be much much more diverse in how they're built. Allowing them to focus purely on stats, or to develop many different abilities, or have a wide range of skills.
*All stats start at 10
*150APT to spend
*Does not use 'Starting Builds
*HP and FP formulas can be changed based on the type of animal, this however will likely change the started APT
Skills
Skills are of some concern with animals however. They can not learn skills that they normal would not learn unless they are specifically taught said skill. Also when learning skills they would not have in the wild, they can not level them higher than their knowledge divided by 10 (KNW/10). There is no limit to learning natural.