On the surface, Indy is a very goofy and lighthearted individual, having a loud and melodious laugh and keeping up cheery and confident spirits almost everywhere in public - it's only in front of close people or in private settings that he shows more obvious signs of being schizophrenic (loss of motivation to complete tasks fully, blunted reactions and expressions, decreased confidence and sense of purpose, and more rarely the telltale hallucinations and delusions).
Indy loves the attention and support he gets from his fans, and therefore is almost always seen in his host get-up (he has like five replices of the same outfit) in hopes of being recognized in public
Speaking style
almost always speaking in TV and radio related jargon ("Don't touch that dial!", "Coming up next!", "Please stand by, people!", and let's not forget his old catchphrase: "HELLOOOOOOO MY GORGEOUS AUDIENCE!!!")
Motivation
To recover from his mental illness and be close to his son zaf again
Lore hook
Indigo is a famous comedy-talk show host and celebrity! Despite it looking unlikely, he has ties to the agency due to being one of their main sponsors ever since the government backed out on them. He also had ties to many people in the P group, including Ali, which WOULD prove useful to the research involving their collective cases - that is, if he had the courage to speak up about what happened to them. Indy is also much more.. scared than he looks. Under all the confidence and goofiness, it's because of his desire of attention and fear of being shunned that he avoids controversy/anything that can taint his reputation. This makes him wary of the wrong kind of attention (including people potentially discovering his ties to the Ali case, or discovering him having schizophrenia due to its reputation), which in turn awfully conflicts his choices and makes him hellbent on hiding a lot of things - including compulsively lying and denying elaboration on many things about him.