A tribute to Mr Tindal-Draper has also been paid by Duchy College, where he had been part of its Military and Protective Services Academy.
In a Facebook post, external from the academy, Mr Tindal-Draper was described as a “passionate, articulate and bright student” who had a strong moral compass.
“He was well liked and respected by his peers, and was not one to shy away from causes he believed in and was instrumental in collecting the three minibus loads of equipment that the learners gathered when the war in Ukraine initially kicked off,” the post said.
“Callum truly believed in his sense of duty and after working for the NHS after the course, decided it was his duty to help Ukraine and joined the International Legion of Ukraine in the summer.”
It added Mr Tindal-Draper would be commemorated during services being held on Sunday and Monday to mark Remembrance Day.