Stats

Strength (Str)
Affects physical damage. Each point of Strength increases minimum and maximum damage by 1.

Can be trained at New Ark's Gym.

Mystic (Mys)
Affects mana reserve. Each point of Mystic increases maximum mana by 3.

You can only learn new spells at certain Mystic level.

Can be trained at Succubus Tower, in the Training Hall.

Nimble (Nim)
Affects your chance to safely avoid taking damage during combat, or breaking free from enemy grabs.

Affects your chance to successfully escape from battle. Chance is 50+(10*Nim)%, maxing out at 5 Nimble.

Can be trained at New Ark's Gym.

Body (Bod)
Affects your stamina reserve. Each point increases maximum stamina by 9.

The more stamina you have, the more you can spend before being Tired, including during trainings at the Gym.

Can be trained at New Ark's Gym.

Speech (Spe)
Only used certain skill-checks, when you interact with NPCs.

Knowledge (Kno)
Affects your spells' physical damage.

Can be trained at Succubus Tower, in the Library.

Senses (Sen)
At certain skill levels, allows to see hidden objects without going close to them.

Certain new locations can be found only if passing Senses check first.

Erotic (Ero)
Affects lust damage dealt by player. Only maximum damage gets increased, minimum damage is always 5.

Also affects Draining Kiss spell, increasing its lust damage.

Can be trained at Succubus Tower, at the Class (+15 per day).