Oligodendrocytes are considered to be the myelinating glia of the central nervous system. Axonal myelination promotes axonal integrity by allowing for rapid saltatory conduction of nerve impulses.
Source: Oligodendrocyte, astrocyte, and Microglia crosstalk in myelin development, damage, and repair. (n.d.). Frontiers. https://www.frontiersin.org/articles/10.3389/fcell.2016.00071/full#:~:text=Oligodendrocytes%20are%20the%20myelinating%20glia,and%20contributes%20to%20axonal%20integrity

Ependymal cells are ciliated-epithelial glial cells that form along the surface of the brain’s ventricles and the spinal canal from radial glia. They are involved in the homeostasis of the cerebrospinal fluid (CSF), brain metabolism, and the removal of waste from the brain.
Source: Single cell Transcriptomics of Ependymal cells across age, region and species reveals cilia-related and metal ion regulatory roles as major conserved Ependymal cell functions. (n.d.). Frontiers. https://www.frontiersin.org/articles/10.3389/fncel.2021.703951/full#:~:text=Ependymal%20cells%20are%20ciliated%2Depithelial,of%20waste%20from%20the%20brain

Satellite cells are mononucleated cells wedged themselves between the muscle fiber’s basement membrane and plasma membrane. They function as stem cells and are in charge of skeletal muscle growth and development. In response to injury, are able to re-enter the cell cycle, producing new cells to repair and create nascent muscle fibers while preserving a small population for future regenerative demands. Muscle growth and repair in response to stresses such as exercise, injury, or disease are both regulated by this protein. Satellite cells’ exact role in the development of muscle fiber atrophy with age is unknown.
Source: Satellite cell. (n.d.). Physiopedia. https://www.physio-pedia.com/Satellite_Cell#:~:text=repair%20and%20remodeling.-,Satellite%20cells,and%20development%20of%20skeletal%20muscles