Having arrived in France at an early age, Manvelyan grew up in Pont-Hébert, La Manche, first playing football with FC Saint-Lô, before moving to the US Granville as an under-13.
[4] During the 2018–19 season, he won the national U17 championship, scoring 5 goals and 6 assists with a team comprising the likes of Jean-Claude Ntenda, Lohann Doucet, Mohamed Achi, Jean-Baptiste Gorby and Quentin Merlin.
[3][6][10][11] He was also a standout in the 2019–20 [fr] Coupe Gambardella, as Nantes reached the quarter finals of the national youth cup, before the competition was eventually also canceled.
[22] Coming though the FC Nantes academy as a versatile midfielder, he rose to prominence as an offensively minded player, mostly as a false nine, regularly scoring goals.
[3] He is described as a calm, good under pressure, technically gifted player, compensating his modest speed with great game vision.