This character uses the Eberron Campaign Setting (where the Kalashtar appear) and the Expanded Psionics Handbook.

Amavakti appears to be a sophisticated and beautiful woman of means. In truth, she is Kalashtar, one of a refugee race on the run from powerful Lovecraftian spirits from the Realm of Dreams. Her first goal is to remain hidden, the second to help her people, and the third to do as much good in the world as she can without violating her other two goals. To preserve secrecy, she ends up working through others. For these reasons, she makes a good patron for lower-level PCs, maturing into a close friend or romantic relationship once her true nature is discovered.

The kalashtar be mistaken for human by the casual eye (in fact, they are a distinct race created when a group of humans melded with spirits from the realm of dreams). Amavakti avoids demonstrating her telepathic abilities. When forced to use her psionic powers in public, she tries to use gestures and chants a manner similar to an arcane caster.
Though it is not part of the core rules DMs wishing to preserve a sense of mystery may allow her to use Bluff skill opposed to any Spellcraft check used to mis-identify her abilities.

Amavakti (female kalashtar psion 6 [telepath]): HD 6d4+6; 23 hp; Init +1; AC 14 (touch 12, flat-footed 13); BAB +3; Grap +2; Atk +2 melee (1d4-1/19-20 dagger), +4 ranged; SQ Kalashtar traits, psionics; AL LG; SV Fort +3, Ref +3, Will +7; Str 9, Dex13, Con 12, Int 18 (16), Wis15, Cha 16.

Skills & Feats: Bluff +12, Concentration +10 (+14 to gain focus), Diplomacy +16, Disguise +3 (+5 to act in character, +5 to impersonate a human), Intimidate +5, Knowledge (psionics) +13, Psicraft +15, Sense Motive +11, Sleight of Hand +3; Greater Psionic Endowment, Narrow Mind, Overchannel, Psionic Endowment, Psionic Meditation.

Kalashtar Traits: Amavakti has a +2 bonus on saves against mind-affecting spells and abilities as well as against possession. She has a +2 bonus on Disguise checks to impersonate a human. She does not dream and is immune to spells like nightmare. Finally, she can use the psionic power mindlink once a day as a 3rd level wilder.

Psion Powers Known (50 power points per day): 1—conceal thoughts, empathy, missive, mind thrust (DC 15), psionic charm (DC 15); 2—brain lock (DC 16), cloud mind (DC 16), psionic suggestion (DC 16), read thoughts (DC 16); 3—mind trap, psionic blast (DC 17), telekinetic force (DC 17), telekinetic thrust (DC 17). Increase the DC to resist Amavakti’s powers by +2 if she expends her psionic focus.

Languages: Common, Quor, Draconic, Riedran.

Possessions: dagger, cognizance crystal (1 point), dorje of detect psionics (25 charges), ring of protection +1, bracers of armor +1, amulet of natural armor +1, potion of cure moderate wounds, cloak of resistance +1, headband of intellect +2, 1,325 gp.