Emergency Counseling Hologram

The Emergency Counseling Hologram or ECH was a Federation holographic medical officer specialised in psychology. 

History and specifications
The emergency hologram for counseling was developed by Felix Knightly and supervised by Captain Deanna Troi in the late 24th century to supplement the existing Emergency Medical Hologram deployed on Starfleet ships, to assist with crewmembers psychological needs. The ECH was based on Knightly's holographic lounge singer Vic Fontaine, originally deployed on Deep Space 9 from 2374 for entertainment purposes. 

This continued the trend of expanding the Emergency Medical Hologram template begun in 2373 and trialled from 2381. 

Circa 2399, journalist Jake Sisko interviewed Vic Fontaine at DS9, including asking Fontaine about the new Emergency Counseling Hologram. 

Because of the success of emergency holograms, the Alpha Quadrant Alliance released versions of the Emergency Conn Hologram in 2410, assigned the rank of senior chief specialist. 

All holograms in Allied military service in the 25th century were considered a sentient lifeform and therefore preferably designated a Photonic. 

In 2423, Fontaine's interview was published in Sisko's book .