Raichi is an alien hedgehog girl who crash landed in valicia and is now exploring and living in the planet. she can turn her back spines into tentacles, and her tail also acts as an ovipositor!
she's also allowed her own self to be used for research into creating alien/valician hybrids. This is precisely how she met shikka ,and subsequently stuffed her with eggs ;o
she lacks the conventional sexual organs, and she can only breed by drinking a person's DNA and mixing it with her eggs to fertilize them, otherwise her eggs are duds. they feel like a squishy oval, lacking a hard shell, and are easier to stack together in a tighter space.
she can change body size, as well! normally she's 4ft tall, but she can grow bigger or smaller.

T3R1 is her AI companion. he's is mostly just a recognissance drone, VERY durable, made with a material unknown to the people of valicia and can repel most low tier offensive magic... but he doesnt have any defense mechanisms beyond running away and having a high carrying capacity.
he also has a smug personality, with a fully developed AI that is imprinted to raichi, so they're very good friends. his job is mostly just telling her what the things he scans are made of, and collecting data on the planet, culture, its people, etc.