Cobalt_Pony

Short version:

Powers/abilities

Shapeshifting
Can make bodily fluids
Can carry items and people safely inside body
Owns a magic sofa that changes size and shape to match current form
Superior senses of touch and taste
Immune to psychic attacks/influence (has no brain)
Immune/resistant to most forms of harm
Indigestible
Very cute and cuddly

Weaknesses/vulnerabilities
Laughing too hard (reverts to liquid, tickling NOT recommended))
Sonic weapons/attacks (reverts to liquid)
Fire or extreme heat
Electricity
Energy weapons that damage at the molecular level (ie not lasers)
Magic
Has no other senses than touch or taste, can only use these two to make up for the others (eg feeling vibrations in the air to see or hear)
Cannot resist tasty prey like you :3

Longer stuff:

Cobalt is a shapeshifter, though Cobalt actually is genderless, taking any form or mix. His/her natural form is a puddle of liquid. He/she usually uses the pronouns for the sex of his/her current form.

Cobalt primarily speaks Common, but also speaks fluent Equestrian due to his/her years spent living amongst ponies.

Cobalt can take any form he/she wants (within secret size limitations), as long as it is a solid form and all parts of his/her body remain connected. He/she can make liquids that can separate from his/her body, but they are limited to normal bodily fluids, such as saliva, semen, stomach acid, blood, milk, etc. Cobalt thinks that the extra mass lost or gained upon changing form is stored in a subspace pocket, but isn't entirely sure.

Cobalt doesn't need to eat, but enjoys it. He/she can digest anything that is organic. He/she eats by absorbing matter through his/her fluidic membrane, a nearly instantaneous process that is relatively painless for living creatures. Though he/she often swallows food into a "stomach" when around solids, he/she does not need to do this to eat, and could simply absorb his/her food. He/She doesn't often eat live creatures, and almost never sapient ones, but he/she might make exceptions on occasion, or if extremely hungry. His/her digestive process could be tweaked to include dissolving with alkaline fluid, if desired. The reason that Cobalt would use a base instead of an acid to dissolve prey is the fact that base burns are much less painful than acid. It is unknown what happens to food that Cobalt eats, as no waste is excreted. It's possible that it becomes extra mass stored in Cobalt's subspace pocket.

Cobalt likes to joke and especially makes puns, and likes to be dominant in any possible way, whether it be by controlling conversations, misleading questions and avoiding straight answers by intentionally being cryptic, and being generally annoying, though he/she never means it as anything but good-natured fun. However, he/she doesn't make friends easily, because of the fear of them discovering his/her secret nature and many twisted fetishes and strange interests and hobbies. He/she has even more trouble with relationships, as he/she doesn't really know if anyone would accept him/her for the freak he/she really is. But in the end, he/she is a nice person who likes to make people happy.

Cobalt is pansexual and has no gender (or species) preference for relationships. He/she actually considers the concept of gender and being exclusively hetero or homosexual offensive because he/she views it as discrimination in love. He/she doesn't identify strictly as male or female, rather he sees him/herself as "a person, thank you." Although he/she could potentially be in a relationship with anyone, he/she doesn't really like penetrative sex and prefers alternate methods of expressing love and affection (kissing, hugging, cuddling, vore). With someone he/she loves, he is very sweet and gentle, but can tease and torment them in order to make them submissive, including outside the bedroom. In vore, he/she prefers to be the predator almost every time, but he/she may make an exception for someone he/she cares about. He/she is very gentle in vore, and it is non-fatal unless he/she specifies otherwise. However, when extremely hungry, he/she is not above hunting prey down and consuming them without remorse.

Cobalt goes crazy for tummy rubs.

Cobalt's origin story, if you're interested.
http://aryion.com/g4/view/260173

Cobalt's associates
http://profile.aryion.com/profile/Scaletail (A somewhat casual acquaintance)
http://profile.aryion.com/profile/Nora_Anaconda (A close friend)
http://profile.aryion.com/profile/Sunny_the_Yoshi (A potential friend separated by language barrier)